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1.
J Transl Med ; 22(1): 610, 2024 Jul 02.
Article in English | MEDLINE | ID: mdl-38956593

ABSTRACT

Fibrosis is the aberrant process of connective tissue deposition from abnormal tissue repair in response to sustained tissue injury caused by hypoxia, infection, or physical damage. It can affect almost all organs in the body causing dysfunction and ultimate organ failure. Tissue fibrosis also plays a vital role in carcinogenesis and cancer progression. The early and accurate diagnosis of organ fibrosis along with adequate surveillance are helpful to implement early disease-modifying interventions, important to reduce mortality and improve quality of life. While extensive research has already been carried out on the topic, a thorough understanding of how this relationship reveals itself using modern imaging techniques has yet to be established. This work outlines the ways in which fibrosis shows up in abdominal organs and has listed the most relevant imaging technologies employed for its detection. New imaging technologies and developments are discussed along with their promising applications in the early detection of organ fibrosis.


Subject(s)
Abdomen , Fibrosis , Humans , Abdomen/diagnostic imaging , Abdomen/pathology
2.
Magn Reson Med ; 2024 Jun 09.
Article in English | MEDLINE | ID: mdl-38852176

ABSTRACT

PURPOSE: Development of a color scheme representation to facilitate the interpretation of tri-exponential DWI data from abdominal organs, where multi-exponential behavior is more pronounced. METHODS: Multi-exponential analysis of DWI data provides information about the microstructure of the tissue under study. The tri-exponential signal analysis generates numerous parameter images that are difficult to analyze individually. Summarized color images can simplify at-a-glance analysis. A color scheme was developed in which the slow, intermediate, and fast diffusion components were each assigned to a different red, green, and blue color channel. To improve the appearance of the image, histogram equalization, gamma correction, and white balance were used, and the processing parameters were adjusted. Examples of the resulting color maps of the diffusion fractions of healthy and pathological kidney and prostate are shown. RESULTS: The color maps obtained by the presented method show the merged information of the slow, intermediate, and fast diffusion components in a single view. A differentiation of the different fractions becomes clearly visible. Fast diffusion regimes, such as in the renal hilus, can be clearly distinguished from slow fractions, such as in dense tumor tissue. CONCLUSION: Combining the diffusion information from tri-exponential DWI analysis into a single color image allows for simplified interpretation of the diffusion fractions. In the future, such color images may provide additional information about the microstructural nature of the tissue under study.

3.
Medicina (Kaunas) ; 59(10)2023 Sep 25.
Article in English | MEDLINE | ID: mdl-37893431

ABSTRACT

Abdominal injuries in children caused by guns are a rare clinical entity globally. But, in countries with undefined legal regulations and in war zones, urban violence is a tremendous social problem among older children and adolescents. This manuscript provides details regarding two cases of severe gunshot injuries in young children. The injuries were very complicated and included damage to the parenchymatous and hollow organs and major blood vessels. The clinical presentation on admission was severe and dramatic, but the patients survived. However, one patient developed numerous complications that required repeated surgical interventions and long treatment. This article provides a detailed description of injuries and how to treat them. Patient care requires a multidisciplinary approach, and the initial decision on further treatment depends on the patient's hemodynamic stability.


Subject(s)
Abdominal Injuries , Wounds, Gunshot , Child , Adolescent , Humans , Child, Preschool , Wounds, Gunshot/complications , Wounds, Gunshot/surgery , Abdominal Injuries/complications , Abdominal Injuries/diagnosis , Abdominal Injuries/surgery , Reoperation , Retrospective Studies
4.
Front Oncol ; 13: 1209558, 2023.
Article in English | MEDLINE | ID: mdl-37483486

ABSTRACT

Introduction: Multi-sequence multi-parameter MRIs are often used to define targets and/or organs at risk (OAR) in radiation therapy (RT) planning. Deep learning has so far focused on developing auto-segmentation models based on a single MRI sequence. The purpose of this work is to develop a multi-sequence deep learning based auto-segmentation (mS-DLAS) based on multi-sequence abdominal MRIs. Materials and methods: Using a previously developed 3DResUnet network, a mS-DLAS model using 4 T1 and T2 weighted MRI acquired during routine RT simulation for 71 cases with abdominal tumors was trained and tested. Strategies including data pre-processing, Z-normalization approach, and data augmentation were employed. Additional 2 sequence specific T1 weighted (T1-M) and T2 weighted (T2-M) models were trained to evaluate performance of sequence-specific DLAS. Performance of all models was quantitatively evaluated using 6 surface and volumetric accuracy metrics. Results: The developed DLAS models were able to generate reasonable contours of 12 upper abdomen organs within 21 seconds for each testing case. The 3D average values of dice similarity coefficient (DSC), mean distance to agreement (MDA mm), 95 percentile Hausdorff distance (HD95% mm), percent volume difference (PVD), surface DSC (sDSC), and relative added path length (rAPL mm/cc) over all organs were 0.87, 1.79, 7.43, -8.95, 0.82, and 12.25, respectively, for mS-DLAS model. Collectively, 71% of the auto-segmented contours by the three models had relatively high quality. Additionally, the obtained mS-DLAS successfully segmented 9 out of 16 MRI sequences that were not used in the model training. Conclusion: We have developed an MRI-based mS-DLAS model for auto-segmenting of upper abdominal organs on MRI. Multi-sequence segmentation is desirable in routine clinical practice of RT for accurate organ and target delineation, particularly for abdominal tumors. Our work will act as a stepping stone for acquiring fast and accurate segmentation on multi-contrast MRI and make way for MR only guided radiation therapy.

5.
Cureus ; 15(6): e40959, 2023 Jun.
Article in English | MEDLINE | ID: mdl-37503464

ABSTRACT

Traumatic diaphragmatic hernia (TDH) is a rare condition resulting from blunt or penetrating thoracoabdominal trauma and is characterized by the protrusion of abdominal organs into the thoracic cavity through a ruptured diaphragm. Due to its diverse clinical presentations, TDH often faces diagnostic challenges. Accurate diagnosis relies on imaging studies and surgical exploration, with surgical intervention being the primary treatment approach. This case presentation highlights a young patient who presented to Saint George Hospital following a blunt thoracoabdominal injury. The patient experienced unexplained dyspnea upon admission, and imaging revealed herniated bowels in the left hemithorax. Laparoscopic exploration confirmed a left hemi-diaphragmatic tear, with the transverse colon, omentum, most of the small bowel, and stomach herniating into the left hemithorax. The patient underwent laparoscopic repair, involving the reduction of the herniated organs into the peritoneal cavity and tension-free primary closure with gastropexy without the use of mesh for reinforcement. The patient's postoperative course was uneventful, and complete recovery was achieved. This case report provides insights into the diagnosis and management of TDH, highlighting the importance of prompt recognition and appropriate surgical intervention in achieving successful outcomes.

6.
Zoology (Jena) ; 159: 126102, 2023 08.
Article in English | MEDLINE | ID: mdl-37364349

ABSTRACT

The batracoidid Plainfin Midshipmen Porichthys notatus Girard has been extensively studied due to the sound production abilities and specializations of its swim bladder. The present study describes three-dimensional variations of the morphology of the swim bladder and sonic muscles of P. notatus during its post-hatch larval development, with the use of three-dimensional computed tomography. This study also includes descriptions of the relative position of the swim bladder to other visceral organs. The swim bladder, digestive tract, and liver were already present in the smallest examined specimens (5.9 mm; newly hatched larvae) along with the yolk sac. In the smallest specimens, the digestive tract is straight, but from 7.1 mm TL, the digestive tract forms the first intestinal loops, and at 25.5 mm TL, a second intestinal loop. In smallest specimens, the swim bladder is oval, but at 7.1 mm TL, the anterior margin starts invaginating, forming a pair of anterior lobes. The first appearance of the intrinsic sonic muscles in swim bladder occurs at 13.1 mm TL. Additionally, we provide comparisons between the shape of the swim bladder of P. notatus and other species. The shape of the swim bladder of P. notatus and other members of Porichthyinae have an ovoid posterior region with two anterior lobes and differs from the cordiform or semiconected/bilobed the swim bladders observed in the other Batrachoididae.


Subject(s)
Batrachoidiformes , Animals , Batrachoidiformes/anatomy & histology , Batrachoidiformes/physiology , Urinary Bladder , Sound
7.
Pediatr Surg Int ; 39(1): 194, 2023 May 09.
Article in English | MEDLINE | ID: mdl-37160490

ABSTRACT

Congenital diaphragmatic hernia (CDH) is a birth defect characterized by the incomplete closure of the diaphragm and herniation of abdominal organs into the chest during gestation. This invariably leads to an impairment in fetal lung development (pulmonary hypoplasia) that involves the pulmonary vessels (vascular remodeling) leading to postnatal pulmonary hypertension. Moreover, approximately 60% of CDH survivors have long-term comorbidities, including critical cardiac anomalies, neurodevelopmental impairment, gastroesophageal reflux, and musculoskeletal malformations. While the pathophysiology of the diaphragmatic defect and pulmonary hypoplasia have been studied in detail over the decades, less is known about the other organs affected in CDH. In this review, we searched the literature for reports on other organs beyond the lung and diaphragm in human and experimental models of CDH. We found studies reporting gross morphometric changes and alterations to biological pathways in the heart, brain, liver, kidney, gastrointestinal tract, and musculoskeletal system. Given the paucity of literature and the importance that these comorbidities play in the life of patients with CDH, further studies are needed to comprehensively uncover the pathophysiology of the changes observed in these other organs.


Subject(s)
Hernias, Diaphragmatic, Congenital , Hypertension, Pulmonary , Humans , Diaphragm , Liver , Lung
8.
Khirurgiia (Mosk) ; (12): 78-84, 2022.
Article in Russian | MEDLINE | ID: mdl-36469472

ABSTRACT

OBJECTIVE: To determine the features of diagnosis and clinical course of abdominal tuberculosis in children. MATERIAL AND METHODS: Eighteen children aged from 5 days to 16 years with abdominal tuberculosis have been followed-up throughout 50 years. Diagnostic process implied anamnesis, objective examination, laboratory data and specific samples, ultrasound, X-ray examination, MRI, CT and morphological examination of specimens. RESULTS: Intestinal form was diagnosed in 2 children with abdominal tuberculosis, mesadenitis - 3 patients, liver tuberculosis - 4 ones, tuberculosis of uterine appendages - 3 patients, peritonitis - 6 ones. CT of the abdomen, diaskintest and morphological examination were the most important diagnostic methods. Laparotomy was performed in 16 children. Five cases are decsribed. CONCLUSION: Abdominal tuberculosis in children is mostly secondary. Several anatomical regions are simultaneously involved in specific process. Isolated lesion of one abdominal organ is rare. Active tuberculosis of respiratory organs in pregnant women has a significant negative impact on the fetus and newborns.


Subject(s)
Tuberculosis, Gastrointestinal , Infant, Newborn , Pregnancy , Child , Humans , Female , Tuberculosis, Gastrointestinal/complications , Tuberculosis, Gastrointestinal/diagnosis , Tuberculosis, Gastrointestinal/surgery , Abdomen , Laparotomy , Ultrasonography
9.
Med Phys ; 49(9): 5953-5963, 2022 Sep.
Article in English | MEDLINE | ID: mdl-35689601

ABSTRACT

BACKGROUND: Image registration has long been an active research area in the society of medical image computing, which is to perform spatial transformation between a pair of images and establish a point-wise correspondence to achieve spatial consistency. PURPOSE: Previous work mainly focused on learning complicated deformation fields by maximizing the global-level (i.e., foreground plus background) image similarity. We argue that taking the background similarity into account may not be a good solution, if we only seek the accurate alignment of target organs/regions in real clinical practice. METHODS: We, therefore, propose a novel concept of S a l i e n t $Salient$ R e g i s t r a t i o n $Registration$ and introduce a novel deformable network equipped with a saliency module. Specifically, a multitask learning-based saliency module is proposed to discriminate the salient regions-of-registration in a semisupervised manner. Then, our deformable network analyzes the intensity and anatomical similarity of salient regions, and finally conducts the salient deformable registration. RESULTS: We evaluate the efficacy of the proposed network on challenging abdominal multiorgan CT scans. The experimental results demonstrate that the proposed registration network outperforms other state-of-the-art methods, achieving a mean Dice similarity coefficient (DSC) of 40.2%, Hausdorff distance (95 HD) of 20.8 mm, and average symmetric surface distance (ASSD) of 4.58 mm. Moreover, even by training using one labeled data, our network can still attain satisfactory registration performance, with a mean DSC of 39.2%, 95 HD of 21.2 mm, and ASSD of 4.78 mm. CONCLUSIONS: The proposed network provides an accurate solution for multiorgan registration and has the potential to be used for improving other registration applications. The code is publicly available at https://github.com/Rrrfrr/Salient-Deformable-Network.


Subject(s)
Image Processing, Computer-Assisted , Image Processing, Computer-Assisted/methods
10.
World J Transplant ; 12(5): 83-87, 2022 May 18.
Article in English | MEDLINE | ID: mdl-35663542

ABSTRACT

This editorial describes the indications and technical aspects of the simultaneous retrieval of thoracic and abdominal organs in Maastricht III donors as well as the preservation of such organs until their implantation.

11.
Int. j. med. surg. sci. (Print) ; 8(3): 1-14, sept. 2021. tab, ilus, graf
Article in English | LILACS | ID: biblio-1292471

ABSTRACT

The accuracy of internal organ volume estimation done with ultrasound (US) was found to be multifactorial. Hence, we aimed to describe and validate the volume assessment of ultrasound and standard volume estimation formulae for different shaped intra-abdominal organs using spleens and kidneys.Dissected cadaveric kidneys (n=25) and spleens (n=29) were scanned to obtain linear measurements and ultrasound auto-generated volumes (USV). Linear measurements were used to calculate the volumes manually with ellipsoid, prolate, and Lambert volume estimating formulae. The actual volumes (AV) of organs were obtained by the water displacement method. Volume assessment accuracy of USV and different formulae were compared by comparing bias, precision and Bland-Altman plot analysis. The US linear and volume measurement procedure was reliable with high inter and intra-observer agreements (linear: Chronbach's α=0.983 to 0.934; volumes: Chronbach's α=0.989). USV estimates were accurate with a high correlation to AV and low estimation bias (-5.9%). Also, prolate (bias=-0.75%) and ellipsoid formulae (bias=-3.75%) were reliable with a negligible bias in estimated volumes. Contrary, the Lambert formula was unreliable due to a high bias (41.6%). For all evaluated methods, the estimation error found to be related to the organ size (T=3.483; p=0.001), mainly when the assessed organ is larger than 50 ml. Also, the shape related estimation error found to be related to the volume estimation formula used.This study has validated the USV for kidney and splenic volume assessments while describing volume-calculating formula employed, organ size and shape as significant contributors for volume estimation accuracy.


Se encontró que la precisión de la estimación del volumen de órganos internos realizada con ultrasonido (US) es multifactorial. El objetivo fue describir y validar la evaluación de volumen mediante ecografía y las fórmulas estándar de estimación de volumen para órganos intraabdominales de diferentes formas utilizando bazos y riñones.Se evaluaron riñones cadavéricos disecados (n = 25) y bazos (n = 29) para obtener medidas lineales y volúmenes autogenerados por ultrasonido (USV). Se utilizaron medidas lineales para calcular los volúmenes manualmente con fórmulas de estimación de volumen elipsoide, prolate y Lambert. Los volúmenes reales (AV) de los órganos se obtuvieron mediante el método de desplazamiento de agua. Se comparó la precisión de la evaluación del volumen de USV y diferentes fórmulas comparando el sesgo, la precisión y el análisis de la gráfica de Bland-Altman. El procedimiento de medición lineal y de volumen mediante US fue confiable con alta concordancia inter e intraobservadores (lineal: α de Chronbach = 0,983 a 0,934; volúmenes: α de Chronbach = 0,989). Las estimaciones de USV fueron precisas con una alta correlación con AV y un bajo sesgo de estimación (-5,9%). Además, las fórmulas prolate (sesgo= -0,75%) y elipsoide (sesgo = -3,75%) fueron confiables con un sesgo insignificante en los volúmenes estimados. Por el contrario, la fórmula de Lambert no fue confiable debido a un alto sesgo (41,6%). Para todos los métodos evaluados, se encontró que el error de estimación estaba relacionado con el tamaño del órgano (T = 3.483; p = 0.001), principalmente cuando el órgano evaluado es mayor de 50 ml. Además, se encontró que el error de estimación de forma está relacionado con la fórmula de estimación de volumen utilizada.Este estudio ha validado el USV para evaluaciones de volumen renal y esplénico al mismo tiempo que describe la fórmula de cálculo de volumen empleada, el tamaño y la forma de los órganos como contribuyentes significativos de la precisión de la estimación de volumen.


Subject(s)
Spleen/diagnostic imaging , Ultrasonography/methods , Kidney/diagnostic imaging , Organ Size , Spleen/anatomy & histology , Kidney/anatomy & histology
12.
Acta Vet Scand ; 63(1): 4, 2021 Jan 21.
Article in English | MEDLINE | ID: mdl-33478520

ABSTRACT

BACKGROUND: The ultrasonographic examination technique is a well-established, non-invasive diagnostic tool for diverse conditions in humans and different animal species. The purpose of our study was to describe ultrasonographic localisation, sonographic appearance and dimensions of the kidneys and spleen of clinically healthy llamas and alpacas. Differences between llamas and alpacas and the influence of sex and ages were investigated. Results of this study may aid veterinarians performing ultrasonography in diseased animals and the technique can be used for routine protocol screening. RESULTS: Ultrasonography was performed in 135 clinically healthy, non-sedated llamas and alpacas. Screening was performed with a 6.6 MHz curve linear transducer with only alcohol as contact medium between the probe and unclipped skin. The kidneys could be imaged from the paralumbar region. The right kidney only was visualized when scanning from the right and the left kidney only from the left. While the left kidney appeared in sagittal view as an oval shape in most llamas and alpacas, in one third of animals the left kidney had a triangular shape. The L-shaped base of the spleen, with its homogeneous, echoic pattern, could be seen craniolateral to the left kidney. Anechoic areas displaying vessels inside the spleen and a thin echoic capsule surrounding the splenic tissue could be differentiated. While sonographic appearances of the examined organs showed no differences between llamas and alpacas, selected dimensions of both of kidney and spleen showed significant differences between species. In terms of age and sex, significant differences in respect of kidney size could be found only in alpacas. Sex seemed to have no influence on kidney and spleen sizes in llamas. CONCLUSIONS: The present study provides species-specific information on ultrasonographic appearance and reference values for kidney and spleen dimensions of clinically healthy llamas and alpacas. Results show differences in organ sizes between llamas and alpacas and in alpacas of different sex and age. The results of this study can be used as references for veterinarians performing ultrasound examinations in diseased animals.


Subject(s)
Camelids, New World/anatomy & histology , Kidney/anatomy & histology , Spleen/anatomy & histology , Animals , Female , Kidney/diagnostic imaging , Male , Reference Values , Species Specificity , Spleen/diagnostic imaging , Ultrasonography/veterinary
13.
Med Image Comput Comput Assist Interv ; 12262: 347-358, 2020 Oct.
Article in English | MEDLINE | ID: mdl-33364627

ABSTRACT

Our contribution is a unified cross-modality feature disentagling approach for multi-domain image translation and multiple organ segmentation. Using CT as the labeled source domain, our approach learns to segment multi-modal (T1-weighted and T2-weighted) MRI having no labeled data. Our approach uses a variational auto-encoder (VAE) to disentangle the image content from style. The VAE constrains the style feature encoding to match a universal prior (Gaussian) that is assumed to span the styles of all the source and target modalities. The extracted image style is converted into a latent style scaling code, which modulates the generator to produce multi-modality images according to the target domain code from the image content features. Finally, we introduce a joint distribution matching discriminator that combines the translated images with task-relevant segmentation probability maps to further constrain and regularize image-to-image (I2I) translations. We performed extensive comparisons to multiple state-of-the-art I2I translation and segmentation methods. Our approach resulted in the lowest average multi-domain image reconstruction error of 1.34±0.04. Our approach produced an average Dice similarity coefficient (DSC) of 0.85 for T1w and 0.90 for T2w MRI for multi-organ segmentation, which was highly comparable to a fully supervised MRI multi-organ segmentation network (DSC of 0.86 for T1w and 0.90 for T2w MRI).

14.
Front Microbiol ; 11: 1713, 2020.
Article in English | MEDLINE | ID: mdl-32765481

ABSTRACT

In humans, respiratory infections with influenza A viruses can be lethal, but it is unclear whether non-respiratory influenza A infections can be equally lethal. Intraperitoneal infection makes the abdominal and pelvic organs accessible to pathogens because of the circulation of peritoneal fluid throughout the pelvis and abdomen. We found that high-dose intraperitoneal infection in mice with influenza A viruses resulted in severe sclerosis and structural damage in the pancreas, disruption of ovarian follicles, and massive infiltration of immune cells in the uterus. The intraperitoneal infections also caused robust upregulation of proinflammatory mediators including IL-6, BLC, and MIG. In addition, low-dose intraperitoneal infection with one influenza strain provided cross-protection against subsequent intraperitoneal or intranasal challenge with another influenza strain. Our results suggest that low-dose, non-respiratory administration might provide a route for influenza vaccination. Furthermore, these results provide insight on the pathological role of influenza A viruses in high-risk patients, including women and diabetic individuals.

16.
Am J Physiol Gastrointest Liver Physiol ; 316(1): G187-G196, 2019 01 01.
Article in English | MEDLINE | ID: mdl-30335473

ABSTRACT

Diffusion-weighted magnetic resonance imaging (DW-MRI) uses water as contrast and enables the study of perfusion in many organs simultaneously in situ. We used DW-MRI in a hypodynamic sepsis model, comparing abdominal organ perfusion with global hemodynamic measurements and inflammation. Sixteen anesthetized piglets were randomized into 3 groups: 2 intervention (sepsis) groups: HighMAP (mean arterial pressure, MAP > 65 mmHg) and LowMAP (MAP between 50 and 60 mmHg), and a Healthy Control group (HC). Sepsis was obtained with endotoxin and the desired MAP maintained with norepinephrine. After 6 h, DW-MRI was performed. Acute inflammation was assessed with IL-6 and TNFα in abdominal organs, ascites, and blood and by histology of intestine (duodenum). Perfusion of abdominal organs was reduced in the LowMAP group compared with the HighMAP group and HC. Liver perfusion was still reduced by 25% in the HighMAP group compared with HC. Intestinal perfusion did not differ significantly between the intervention groups. Cytokine concentrations were generally higher in the LowMAP group but did not correlate with global hemodynamics. However, cytokines correlated with regional perfusion and, for liver and intestine, also with intra-abdominal pressure. Histopathology of intestine worsened with decreasing perfusion. In conclusion, although a low MAP (≤60 mmHg) indicated impeded abdominal perfusion in experimental sepsis, it did not predict inflammation, nor did other global measures of circulation. Decreased abdominal perfusion partially predicted inflammation but intestine, occupying most of the abdomen, and liver were also affected by intra-abdominal pressure. NEW & NOTEWORTHY The study increases the knowledge of abdominal perfusion during sepsis. We used diffusion weighted imaging to assess perfusion simultaneously and noninvasively in different abdominal organs. The technique has not been used in a sepsis model before. Cytokine concentrations were measured in different abdominal organs and vascular beds and related to regional perfusion. Decreased abdominal perfusion, but not global measures of circulation, predicted inflammation. Intestine, occupying most of the abdomen, and liver were also affected by intra-abdominal pressure.


Subject(s)
Abdomen/pathology , Inflammation/pathology , Perfusion/adverse effects , Sepsis/pathology , Animals , Cytokines/metabolism , Diffusion Magnetic Resonance Imaging/methods , Hemodynamics/physiology , Intestines/pathology , Kidney/pathology , Liver/pathology , Male , Swine
17.
Int J Legal Med ; 131(5): 1369-1376, 2017 Sep.
Article in English | MEDLINE | ID: mdl-28624986

ABSTRACT

OBJECTIVES: The present study aimed to evaluate if simultaneous temperature-corrected T1, T2, and proton density (PD) 1.5 T post-mortem MR quantification [quantitative post-mortem magnetic resonance imaging (QPMMRI)] is feasible for characterizing and discerning non-pathologic upper abdominal organs (liver, spleen, pancreas, kidney) with regard to varying body temperatures. METHODS: QPMMRI was performed on 80 corpses (25 females, 55 males; mean age 56.2 years, SD 17.2) prior to autopsy. Core body temperature was measured during QPMMRI. Quantitative T1, T2, and PD values were measured in the liver, pancreas, spleen, and left kidney and temperature corrected to 37 °C. Histologic examinations were conducted on each measured organ to determine non-pathologic organs. Quantitative T1, T2, and PD values of non-pathologic organs were ANOVA tested against values of other non-pathologic organ types. RESULTS: Based on temperature-corrected quantitative T1, T2, and PD values, ANOVA testing verified significant differences between the non-pathologic liver, spleen, pancreas, and left kidneys. CONCLUSIONS: Temperature-corrected 1.5 T QPMMRI based on T1, T2, and PD values may be feasible for characterization and differentiation of the non-pathologic liver, spleen, pancreas, and kidney. The results may provide a base for future specific pathology diagnosis of upper abdominal organs in post-mortem imaging.


Subject(s)
Body Temperature , Kidney/diagnostic imaging , Liver/diagnostic imaging , Magnetic Resonance Imaging , Pancreas/diagnostic imaging , Spleen/diagnostic imaging , Female , Humans , Image Processing, Computer-Assisted , Linear Models , Male , Middle Aged , Postmortem Changes , Prospective Studies
18.
Eur J Cardiothorac Surg ; 51(4): 715-721, 2017 04 01.
Article in English | MEDLINE | ID: mdl-28380632

ABSTRACT

Objectives: Although right ventricular failure (RVF) is a major concern after left ventricular assist device (LVAD) implantation, methodologies to evaluate RV function remain limited. Liver stiffness (LS), which is closely related to right-sided filling pressure and may indicate RVF severity, could be non-invasively and repeatedly assessed using transient elastography. Here we investigated the suitability of LS as a parameter of RV function in pre- and post-LVAD periods. Methods: The study included 55 patients with LVAD implantation as a bridge to transplantation between 2011 and 2015 whose LS was assessed using transient elastography. Results: Seventeen patients presented with RVF, defined as requiring inotropic support for ≥30 days, nitric oxygen inhalation for ≥5 days, and/or mechanical RV support following LVAD implantation. Survival of patients with RVF was significantly worse compared with that of patients without RVF. Multivariate logistic regression analysis identified preoperative LS, LV diastolic dimension, RV stroke work index, and dilated phase of hypertrophic cardiomyopathy aetiology as significant risk factors; the combination of these parameters could improve predictive power of post-LVAD RVF with areas under the curve of 0.89. Furthermore, LS was significantly decreased by LV unloading and significantly correlated with right-sided filling pressure. Conclusions: In addition to dilated hypertrophic cardiomyopathy aetiology, reduced RV stroke work index and small LV dimension, we demonstrated that non-invasively measured LS was a predictor of post-LVAD RVF and can be used as a parameter for the evaluation and optimization of RV function in the perioperative period.


Subject(s)
Heart Failure/therapy , Heart-Assist Devices , Ventricular Dysfunction, Right/therapy , Cardiomyopathy, Hypertrophic/diagnostic imaging , Cardiomyopathy, Hypertrophic/physiopathology , Cardiomyopathy, Hypertrophic/therapy , Echocardiography , Elasticity Imaging Techniques , Female , Heart Failure/diagnostic imaging , Heart Failure/physiopathology , Heart Transplantation , Humans , Liver/diagnostic imaging , Liver/physiology , Male , Middle Aged , Perioperative Care/methods , Retrospective Studies , Stroke Volume/physiology , Treatment Outcome , Ventricular Dysfunction, Right/diagnostic imaging , Ventricular Dysfunction, Right/physiopathology , Ventricular Function, Right/physiology
19.
NMR Biomed ; 30(3)2017 Mar.
Article in English | MEDLINE | ID: mdl-26556181

ABSTRACT

Initially, diffusion tensor imaging (DTI) was mainly applied in studies of the human brain to analyse white matter tracts. As DTI is outstanding for the analysis of tissue´s microstructure, the interest in DTI for the assessment of abdominal tissues has increased continuously in recent years. Tissue characteristics of abdominal organs differ substantially from those of the human brain. Further peculiarities such as respiratory motion and heterogenic tissue composition lead to difficult conditions that have to be overcome in DTI measurements. Thus MR measurement parameters have to be adapted for DTI in abdominal organs. This review article provides information on the technical background of DTI with a focus on abdominal imaging, as well as an overview of clinical studies and application of DTI in different abdominal regions. Copyright © 2015 John Wiley & Sons, Ltd.


Subject(s)
Abdomen/anatomy & histology , Abdomen/diagnostic imaging , Diffusion Tensor Imaging/methods , Image Enhancement/methods , Viscera/anatomy & histology , Viscera/diagnostic imaging , Evidence-Based Medicine , Humans , Reproducibility of Results , Sensitivity and Specificity
20.
Int J Clin Exp Pathol ; 8(9): 11814-8, 2015.
Article in English | MEDLINE | ID: mdl-26617932

ABSTRACT

Hydatid disease, which is also known as cystic echinococcosis, is a zoonotic infection caused by the cestode tapeworm Echinococcus granulosus and rarely by Echinococcus multilocularis. In this report we describe an unusual case of a 19-year-old woman who was admitted to our hospital for abdominal pain, nausea, and vomiting. Computed tomography revealed multi-organ abdominal echinococcosis. The patient recovered after undergoing surgery to excise the cyst. The diagnosis, clinical features, treatment, and prevention in this case of multi-organ abdominal echinococcosis are discussed, in light of the relevant literature.


Subject(s)
Abdomen/parasitology , Echinococcosis/parasitology , Abdomen/surgery , Anticestodal Agents/administration & dosage , Echinococcosis/complications , Echinococcosis/diagnosis , Echinococcosis/surgery , Female , Humans , Metronidazole/administration & dosage , Radiography, Abdominal/methods , Therapeutic Irrigation , Tomography, Spiral Computed , Treatment Outcome , Young Adult
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