Green radiography: Exploring perceptions, practices, and barriers to sustainability.

INTRODUCTION: Previous research has delved into the attitudes and behaviors of diverse professions regarding environmental sustainability. However, there needs to be more research specifically targeting radiographers. This study aims to survey radiographers' perceptions, practices, and barriers to change concerning environmental sustainability in radiology. METHODS: Institutional ethical approval was obtained (IRB-COHS-FAC-110-2024) and data collection was conducted using Google Forms (Google Inc., Mountain View, CA). The survey targeted 104 practicing radiographers across several countries. Questions were structured around five domains to gather insights into demographics, training in global warming and climate change, perceptions of sustainability and climate change, sustainability barriers, and current radiology practices on sustainability. Data analysis utilized descriptive and d inferential statistics. RESULTS: One hundred and four radiographers completed the study. Females had a significantly higher attendance rate in environmental protection campaigns (P = 0.01). The majority of respondents (68%) believe in climate change's knowledge and impact on the natural world. Our survey findings demonstrate that 74% of respondents believe there's a need to improve sustainability practices. The most commonly used strategies to decrease energy consumption and emissions were low-energy lighting (60%), real-time power monitoring tools (41%), and energy-efficient heating systems (32%). A significant concern regarding sustainability emerges among respondents: time (50%) and lack of leadership (48%) are prevalent concerns among the identified barriers. CONCLUSION: Participants are recognising the importance of environmental sustainability in radiology, but lack of leadership, support, authority, and facility limitations hinder their adoption. IMPACT ON PRACTICE: Radiology must prioritize environmental sustainability by providing resources and training for radiographers and collaborating with healthcare professionals, policymakers, and environmental experts to develop comprehensive strategies for a sustainable healthcare system.

Quantification of epi- and pericardial adipose tissue deposits between males and females during cardiac CT may potentially help categorize coronary artery disease risk with thoracic circumference.

INTRODUCTION: This study aims to investigate the association between epi- and pericardial adipose tissue deposits around the heart against patient body habitus when using cardiac computed tomography (CT). METHODS: Ninety-two consecutive patients with suspected coronary artery disease underwent coronary CT angiography with quantitative cardiac and adipose tissue volume measurements. Body mass index (BMI), body surface area (BSA), thoracic circumference, anteroposterior diameter, cardiac and adipose tissue volumes were compared between genders by employing Pearson's correlation and results were considered statistically significant if p ≤ 0.05. RESULTS: Statistically significant differences between genders were observed with males having a greater height (males 1.72 ± 0.11), BMI (30.76 ± 7.87 kg/m2), BSA (2.06 ± 0.21 m2), thoracic circumference (1022.12 ± 97.90 mm2), and pericardial adipose tissue volume (46.72 ± 36.62 mm3) (p < 0.05). For men, for Group 1 (BMI ≤ 27) each of the measured volumes showed moderate correlation between pericardial adipose tissue and AP chest-diameter (r = 0.429, p <0.05), whereas in Group 2 (27 < BMI ≤ 31.1), coronary artery volume had a strong association with the AP chest-diameter (r = 0.453, p < 0.05). CONCLUSION: BMI and thoracic circumference are closely related to variable epi- and pericardial adipose tissue volumes in both males and females during cardiac CT. IMPLICATIONS FOR PRACTICE: Quantification of epi- and pericardial adipose tissue deposits between males and females during cardiac CT may help further categorise coronary artery disease risk when including BMI and thoracic circumference for males and females.

To repeat or not to repeat: Radiologists demonstrated more decisiveness than their fellow radiographers in reducing the repeat rate during mobile chest radiography.

INTRODUCTION: Radiologists and radiographers play a complementary role in providing an optimal image quality with decrease radiation dose and proper diagnosis during chest radiographs. We aim Investigate years of experience among radiologists and radiographers on perception of image quality and its impact on repeat rate when evaluating portable pediatric chest radiographs. METHODS: IRB approved retrospective study consisted of randomly selected images (n = 131) of pediatric portable chest radiographs. Images were blindly assessed by four radiologists and four radiographers. Readers were asked to assess qualitative and quantitative image quality by rating: image quality, decision to repeat and image technique. All data was compared employing Pearson's Correlation, Visual grading characteristic (VGC) and Cohens' kappa analyses. RESULTS: Image quality: Radiologists (88.4%) rated images as excellent significantly more than radiographers (11.6%), and radiographers (90.1%) as poor significantly more than radiologists (9.9%) (p < 0.05). Repeat: Radiologists (57%) decided not to repeat images significantly more than radiographers (43%) (p < 0.05). Image technique: Radiologists rated images as acceptable (65%) and excellent (97.7%) significantly more than radiographers (35% and 2.3% respectively) (p < 0.05), whereas radiographers (84%) assessed image technique as poor significantly more than radiologists (16%) (p < 0.05). VGC: radiographers had slightly better qualitative evaluation of image quality than radiologists. An association between image quality (p < 0.002) and repeat decision (p < 0.044) with years of experience was established when comparing years of experience with image assessment rubric, while no association was noted with image technique (p < 0.9). CONCLUSION: Radiologists demonstrated more decisiveness than their fellow radiographers in reducing the repeat rate of portable pediatric chest radiographs. Interestingly, years of experience only seem to affect image technique and image quality assessment among radiologists. IMPLICATIONS FOR PRACTICE: Continuous education of radiographers and close collaboration with radiologists is crucial to achieve optimal image quality and low radiation doses.

Staying abreast of imaging - Current status of breast cancer detection in high density breast.

OBJECTIVES: The aim of this paper is to illustrate the current status of imaging in high breast density as we enter a new decade of advancing medicine and technology to diagnose breast lesions. KEY FINDINGS: Early detection of breast cancer has become the chief focus of research from governments to individuals. However, with varying breast densities across the globe, the explosion of breast density information related to imaging, phenotypes, diet, computer aided diagnosis and artificial intelligence has witnessed a dramatic shift in new screening recommendations in mammography, physical examination, screening younger women and women with comorbid conditions, screening women at high risk, and new screening technologies. Breast density is well known to be a risk factor in patients with suspected/known breast neoplasia. Extensive research in the field of qualitative and quantitative analysis on different tissue characteristics of the breast has rapidly become the chief focus of breast imaging. A summary of the available guidelines and modalities of breast imaging, as well as new emerging techniques under study that can potentially provide an augmentation or even a replacement of those currently available. CONCLUSION: Despite all the advances in technology and all the research directed towards breast cancer, detection of breast cancer in dense breasts remains a dilemma. IMPLICATIONS FOR PRACTICE: It is of utmost importance to develop highly sensitive screening modalities for early detection of breast cancer.

State of the art of coronary computed tomography angiography.

OBJECTIVES: The aim of this paper is to evaluate contrast media (CM) bolus geometry and opacification patterns in the coronary arteries with particular focus on patient, scanner and safety considerations during coronary computed tomography angiography (CCTA). KEY FINDINGS: The rapid evolution of computed tomography (CT) technology has seen this imaging modality challenge conventional coronary angiography in the evaluation of coronary artery disease. Increases in spatial and temporal resolutions have enabled CCTA to become the modality of choice when evaluating the coronary vascular tree as an alternative in the diagnostic algorithm for acute chest pain. However, these new technologic improvements in scanner technology have imposed new challenges for the optimisation of CM delivery and image acquisition strategies. CONCLUSION: Understanding basic CM-imaging principles is essential for designing optimal injection protocols according to each specific clinical scenario, independently of scanner technology. IMPLICATIONS FOR PRACTICE: With rapid advances in CT scanner technology including faster scan acquisitions, the risk of poor opacification of coronary vasculature increases significantly. Therefore, awareness of CM delivery protocols is paramount to consistently provide optimal image quality at a low radiation dose.

Crohn's disease: A retrospective analysis between computed tomography enterography, colonoscopy, and histopathology.

INTRODUCTION: To investigate the spectrum of computed tomography enterography (CTE) findings of active Crohn's disease (CD) in comparison to endoscopic, histopathologic and inflammatory markers. METHODS: Hospital records of 197 patients with known or suspected CD who underwent CTE over a period of 5 years were reviewed. Eighty-nine patients fulfilled the inclusion criteria. Three-point severity scores for endoscopy, pathology, and haematologic inflammatory markers were recorded. The findings on CTE were identified by three readers and correlated with endoscopic, pathologic, and haematologic severity scores. Statistical analysis was carried out employing a Pearson Chi square test and Fisher exact test. Receiver operating characteristic (ROC), visual grading characteristic (VGC) and Cohens' kappa analyses were performed. RESULTS: The CTE findings which were significantly correlated with the severity of active disease on endoscopy include bowel wall thickening, mucosal hyperenhancement, bilaminar stratified wall enhancement, transmural wall enhancement, and mesenteric fluid adjacent to diseased bowel (p < 0.05). Only bowel wall thickening and bilaminar stratified wall enhancement correlated with the pathological severity of active CD. ROC and VGC analysis demonstrated significantly higher areas under the curve (p < 0.0001) together with excellent inter-reader agreement (k = 0.86). CONCLUSION: CTE is a reliable tool for evaluating the severity of active disease and helps in the clinical decision pathway.

Sarcopenic obesity derived from PET/CT predicts mortality in lymphoma patients undergoing hematopoietic stem cell transplantation.

BACKGROUND: Sarcopenic Obesity (SO) is associated with worse survival among chemotherapy recipients. Research on SO is scarce among lymphoma patients receiving Hematopoietic Stem Cell Transplantation (HSCT). AIM: assess prevalence of SO pre-HSCT (T0) and 3 months post-HSCT (T1) in lymphoma patients and determine the power of SO at T0 and T1 in predicting survival. METHODS: Consecutive patients (age ≥16 years) having B and T cell lymphoma who underwent SCT and who had PET/CT scan pre-SCT and 3 months post SCT were included in the study. A cross sectional image was analyzed at the level of the 3rd Lumber Vertebrae to assess body composition parameters. RESULTS: 93 patients [mean age: 38 (range: 17-70 years), 52 (55.9%) males, 45 (48%) Hodgkin and 48 (52%) Non-Hodgkin lymphoma, 81 (87%) autologous and 12 (13%) allogeneic SCT)] met the inclusion criteria. From T0 to T1, Sarcopenia rates increased (27% at T0 to 38% at T1, p = 0.013), Visceral adiposity decreased (46% at T0 to 30% at T1, p = 0.03) and SO decreased (42% at T0 to 20% at T1, p < 0.01). Length of stay, overall survival and progression free survival were significantly better in patients without sarcopenic obesity at T1. Cox-regression revealed SO at T1 was a risk factor for mortality [Adjusted Hazards Ratio = 8.2 (95% Confidence Interval: 1.9-36.2)]. CONCLUSION: Sarcopenic obesity, prevalent in 42% of patients pre-HSCT, decreased 3 months post HSCT as lymphoma patients lost skeletal muscle and visceral adipose tissues. SO at T1 was the most impactful risk factor for mortality.

Gadolinium and Multiple Sclerosis: Vessels, Barriers of the Brain, and Glymphatics.

The pathogenesis of multiple sclerosis is characterized by a cascade of pathobiologic events, ranging from focal lymphocytic infiltration and microglia activation to demyelination and axonal degeneration. MS has several of the hallmarks of an inflammatory autoimmune disorder, including breakdown of the BBB. Gadolinium-enhanced MR imaging is currently the reference standard to detect active inflammatory lesions in MS. Knowledge of the patterns and mechanisms of contrast enhancement is vital to limit the radiologic differential diagnosis in the staging and evaluation of MS lesion activity. The aim of this review was the following: 1) to outline the pathophysiology of the effect of lymphocyte-driven inflammation in MS, 2) to describe the effects of gadolinium on the BBB and glymphatic system, and 3) to describe gadolinium enhancement patterns and artifacts that can mimic lesions in MS.

Increased image quality and reduced radiation dose and contrast media volume: a holistic approach to intracranial CTA.

AIM: To investigate the dose-length product (DLP) during intracranial computed tomography angiography (CTA) using a patient-specific contrast formula. MATERIALS AND METHODS: Intracranial CTA was performed on 120 patients using 64-channel CT. Patients were subjected in equal numbers to one of two acquisitions/contrast medium protocols. Protocol A, consisted of 80 ml contrast medium and protocol B, involved a novel contrast medium formula. In each protocol, contrast medium and saline were injected at a flow rate of 4.5 ml/s. The DLP and contrast volume (CV) were measured between each protocol and the data obtained were compared using two-tailed independent t-test. RESULTS: Mean arterial vessel attenuation was up to 56% (p<0.01) higher using protocol B compared with A. In the venous system, the mean vessel attenuation was significantly lower in protocol B than A with a maximum reduction of 93% (p<0.001). The mean CV was significantly lower in protocol B (53±10 ml) compared to A (80±1 ml, p<0.001). The scan time was equal in each protocol (B, 4.22±1.2 seconds; A, 4.01±1.3 seconds). A significant reduction in mean DLP was demonstrated in protocol B (3.99±0.22 mSv) compared to A (4.74±0.22 mSv; p=0.02). CONCLUSION: A significant reduction in CV and DLP during intracranial CTA can be achieved when employing a patient-specific contrast medium formula.

The diagnostic yield of ultrasound of the head in healthy infants presenting with the clinical diagnosis of benign macrocrania.

AIM: To investigate the frequency of sonographic findings that required neurosurgical consultation for all referred outpatients suspected to have benign macrocrania (BMC). MATERIALS AND METHODS: A retrospective review was performed from September 2011 until June 2015 for all outpatients referred to the ultrasound (US) department for BMC. Electronic medical records, US images, and reports were reviewed in conjunction with follow-up imaging. Each review consisted of gender, specialty of referring physician, first head circumference, head circumference at or closest to the time of the head US, the last head circumference, and any neurological issue prior to the US, at the time of US, or following the US, and clinical outcomes. Statistical analysis employed the Kruskal-Wallis rank sum test and Fischer's exact test (chi square test of independence) that compared normal/BMC patients from the patients requiring a neurosurgical consultation. RESULTS: One hundred and thirty (40.9%) had a normal head US, 181 patients (56.9%) had sonographic findings of BMC, and seven (2.2%) patients had an abnormal head US that required a neurosurgical consultation. Of the 181 patients with BMC, 23 underwent follow-up imaging with 22 patients having unchanged BMC or a normal head US and one patient developing mild ventriculomegaly that was stable on follow-up imaging. Three of the seven patients (1%) aged 1.8, 2.3, and 13.1 months with abnormal head US requiring neurosurgical consultation, had mild ventriculomegaly that was stable on follow-up imaging. Four of the seven patients (1.2%) that required neurosurgical consultation needed a neurosurgical procedure. Between the two US subgroups (normal and BMC), no statistical significance was noted regarding age of patient at US, head circumference at clinical and radiological presentation (p>0.05) except for the first head circumference clinically documented which demonstrated statistical significance (p<0.03). CONCLUSION: Short interval surveillance including head circumference and assessment for the development of bulging anterior fontanelle and neurological abnormalities may be more cost effective than US in the initial evaluation of patients clinically suspected to have BMC.

A case of a 42-year-old patient with anomalous origin of the left main coronary artery from the pulmonary artery who delivered three times with no complications: presentation, diagnosis, and review.

An anomalous origin of the left coronary artery (LCA) from the pulmonary artery or Bland-White-Garland (BWG) syndrome is a rare congenital cardiac anomaly, which is unusual to survive to adulthood if left uncorrected. The authors report an unusual case of a multiparity patient who delivered several times without any complications presenting at the age of 42 years with recurrent dyspnea on exertion in which echocardiographic findings of diastolic flow near the origin of the pulmonary valve were suggestive of anomalous origin of the LCA. A CT angiography confirmed that the left main coronary artery arises from the undersurface of the pulmonary flow close :o its origin and gives rise to a left anterior descending (LAD) and left circumflex arteries.

Predictors of pneumothorax after CT-guided transthoracic needle lung biopsy: the role of quantitative CT.

AIM: To evaluate the association of quantitative computed tomography (CT) measures of emphysema with the occurrence of pneumothorax after CT-guided needle lung biopsy (NLB) accounting for other risk factors. MATERIALS AND METHODS: One hundred and sixty-three CT-guided NLBs performed between 2008 and 2013 with available complete chest CT within 30 days were reviewed for the occurrence of post-procedure pneumothorax. Percent emphysema was determined quantitatively as the percentage of lung voxels below -950 HU on chest CT images using automated software. Multivariable regression was used to assess the association of percent emphysema volume with the occurrence of post-procedure pneumothorax. The association of percent emphysema volume with the pneumothorax size and need for chest tube placement after NLB was also explored. RESULTS: Percent emphysema was significantly associated with the incidence of post-NLB pneumothorax (OR=1.10 95% confidence interval: 1.01-1.15; p=0.03) adjusting for lower-lobe lesion location, needle path length, lesion size, number of passes, and pleural needle trajectory angle. Percent emphysema was not associated with the size of the pneumothorax, nor the need for chest tube placement after NLB. CONCLUSION: Percent emphysema determined quantitatively from chest CT is a significant predictor of post-NLB pneumothorax.

Cátedra de clínica y terapéutica quirúrgica "C" del Hospital Universitario de Caracas. Escuela "Luis Razetti". Facultad de Medicina UCV génesis: desarrollo histórico y actualidad: parte II / Department of clinical and surgical therapeutics \"C\" Hospital Universitario de Caracas, Escuela Luis Razetti UCV Facultad de Medicina genesis: historical development and current: part II

Se presenta la segunda parte del Desarrollo Histórico de la Cátedra de Clínica y Terapéutica Quirúrgica “C” – Servicio de Cirugía III del Hospital Universitario de Caracas. Período que transcurre desde el Dr. Juan Godayol Rovira en el año 1969 hasta el Dr. Humberto Chacón Valecillos en el año 2011. Se describe una síntesis curricular de los aportes más importantes a la Cátedra de Clínica y Terapéutica Quirúrgica “C” – Servicio de Cirugía III en los ámbitos: Docente, Asistencial y de Investigación, aplicados al campo de la Cirugía General y Oncológica de todos estos docentes que han formado parte de ella

It then presents the second part of the Historical Development of the Department of the Chair of Clinical and Surgical Therapeutics “C” - Department of Surgery III of the Hospital University of Caracas. Time that elapses from Dr. Juan Godayol Rovira in 1969 to Dr. Humberto Chacon Valecillos in 2011. There are described a curriculum summary of the most important contributions to the Chair of Clinical and Surgical Therapeutics “C”- Department of Surgery III in the areas: Teaching, Care and Research, applied to the field of General Surgery and Oncology of these teachers that have been part of it

Leiomyosarcoma of the inferior vena cava.

Leiomyosarcoma of the inferior vena cava is a rare primary tumour. We present a case report of a 67-year-old man with a long history of abdominal pain and gastroesophageal reflux, who was found to have a large retroperitoneal mass confirmed to be a leiomyosarcoma. The clinical and imaging features are outlined, and in addition the treatment and prognosis.

Malignant struma ovarii: an unusual presentation.

Malignant struma ovarii is a rare disease; only a few cases are well documented in the literature. Thus, the overall prognosis and modalities of treatment are still somewhat controversial. In this article, the authors report a case of malignant struma ovarii discovered 4 years after ovariectomy after metastasis to the lungs and bones. Review of the pathology of the ovarian struma did not reveal the classic criteria of malignancy, there were, however, many features considered to be atypical and thus suspicious. The patient was treated by total thyroidectomy followed by repetitive doses of 131I. However, because of difficulties in increasing the level of endogenous thyrotropin (TSH) because of functional thyroid metastases in such an advanced disease, recombinant human thyrotropin (rhTSH; Thyrogen, thyrotropin alpha, Genzyme Corporation, Cambridge, MA) was used before administration of radioiodine. With this therapeutic protocol, the patient is still clinically stable 2 years after diagnosis.

[Flexibility of mental representations of spatial information as a function of perspective during learning]. / Flexibilität mentaler Repräsentationen räumlicher Information in Abhängigkeit von der Erwerbsperspektive.

View-based theories of the mental representation of spatial information claim that distinct views experienced during learning are represented separately in memory. Networks of such views are considered to be the basis for spatial navigation. Two experiments (N = 56) investigated the role of observer perspective on the resulting mental representation when learning a spatial configuration on the computer. Learning in route perspective, which induced the impression of passive navigation through the configuration, was compared with a survey perspective, which consisted of an overview of the whole configuration from one point of view. In accordance with view-based theories, previously seen views could be identified faster and with less error than new views for both perspectives during learning. Recoding the information into the alternative perspective was also possible. If participants were asked to integrate distinct route views into a survey view during learning, the flexibility of the resulting mental representation was greatly increased. This indicates that conscious processes such as imagery play an important role in the integration of spatial knowledge.

[Cushing's syndrome and pregnancy: a case report and review of the literature]. / Syndrome de Cushing et grossesse: à propos d'un cas et revue de la littérature.

The association between pregnancy and Cushing syndrome is extremely rare. The diagnosis of Cushing syndrome during pregnancy is rendered difficult by hyperoestrogenic state that alters many of the classical tests. An early and precise diagnosis with adequate management will allow us to reduce maternal and fetal risks.