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1.
Br J Radiol ; 83(988): 336-43, 2010 Apr.
Article in English | MEDLINE | ID: mdl-19620174

ABSTRACT

The purpose of this study is to evaluate the role of diffusion-weighted imaging (DWI) in combination with T(1) and T(2) weighted MRI for the characterisation of renal carcinoma. The institutional review board approved the study protocols and waived informed consent from all of the patients. 47 patients (32 male and 15 female; age range, 21-85 years; median age, 65 years) who had suspected renal lesions on abdominal CT underwent MRI for further evaluation and characterisation of the lesions from April 2005 to August 2007 in our university hospital. A region of interest was drawn around the tumour area on apparent diffusion coefficient (ADC) maps. Final diagnosis was confirmed by histological examination of surgical specimens from all patients. The ADC value was significantly higher in renal cell carcinoma (RCC) than in transitional cell carcinoma (2.71+/-2.35 x 10(-3) mm(2) s(-1) vs 1.61+/-0.80 x 10(-3) mm(2) s(-1); p = 0.022). While analysing the histological subtypes of RCC, a significant difference in ADC values between clear cell carcinoma and non-clear cell carcinoma was found (1.59+/-0.55 x 10(-3) mm(2) s(-1) vs 6.72+/-1.85 x 10(-3) mm(2) s(-1); p = 0.0004). Similarly, ADC values of RCC revealed a significant difference between positive and negative metastatic lesions (1.06+/-0.38 x 10(-3) mm(2) s(-1) vs 3.02+/-2.44 x 10(-3) mm(2) s(-1); p = 0.0004), whereas intensity on T(1) and T(2) weighted imaging did not reach statistical significance. In conclusion, DWI has clinical value in the characterisation of renal carcinomas and could be applied in clinical practice for their management.


Subject(s)
Carcinoma, Renal Cell/diagnosis , Carcinoma, Transitional Cell/diagnosis , Diffusion Magnetic Resonance Imaging/methods , Kidney Neoplasms/diagnosis , Adult , Aged , Aged, 80 and over , Carcinoma, Renal Cell/classification , Carcinoma, Renal Cell/pathology , Carcinoma, Transitional Cell/pathology , Diagnosis, Differential , Female , Humans , Kidney Neoplasms/pathology , Male , Middle Aged , Sensitivity and Specificity , Young Adult
2.
J Psychiatr Res ; 42(6): 443-50, 2008 May.
Article in English | MEDLINE | ID: mdl-17588605

ABSTRACT

OBJECTIVES: To examine in patients with mood disorders the relationship of age at onset with the location and degree of MRI-defined brain hyperintensities. METHOD: Fifty-two patients diagnosed as having mood disorders and 14 controls participated in the study. Brain MR images were analyzed according to semiquantitative ratings for the anatomical distribution and severity of T2-weighted hyperintensities. We compared these hyperintensities among the three age- and sex-matched groups of late-onset mood disorder patients (LOM), early-onset mood disorder patients (EOM), and controls. The time since the onset of disorder was significantly longer in the EOM than in the LOM group. We also conducted linear multiple regression analysis using the severity of hyperintensities as dependent variable to determine whether the clinical features correlate with vascular pathology. RESULTS: As for deep white matter hyperintensity (DWMH), LOM exhibited higher ratings than EOM; as for brain areas, significant between-group differences were detected in the bilateral frontal areas and in the left parieto-occipital area. No significant difference was observed between EOM and controls. As for periventricular hyperintensity, there was no difference among the three groups. We obtained a significant regression model to predict DWMH ratings; age, number of ECTs, and LOM were selected as significant variables. CONCLUSION: The present study suggests that the time since the onset of disorder does not affect the development of white matter lesions, but that white matter lesions are associated with late-onset mood disorders. The frontal areas and the left parieto-occipital area would be important for the development of late-onset mood disorders.


Subject(s)
Bipolar Disorder/diagnosis , Bipolar Disorder/epidemiology , Brain/pathology , Depressive Disorder, Major/diagnosis , Depressive Disorder, Major/epidemiology , Magnetic Resonance Imaging , Age of Onset , Bipolar Disorder/therapy , Depressive Disorder, Major/therapy , Electroconvulsive Therapy/statistics & numerical data , Electrooculography , Female , Humans , Hypertension/epidemiology , Male , Middle Aged
3.
J Psychiatr Res ; 41(7): 591-9, 2007 Oct.
Article in English | MEDLINE | ID: mdl-16684544

ABSTRACT

OBJECTIVES: To explore neurobiological risk factors for major depressive disorder (MDD) and adjustment disorder in cancer patients by examining regional brain metabolism before psychiatric manifestation using positron emission tomography and by prospectively observing depressive and anxiety symptoms. METHOD: Cancer patients who showed no psychiatric symptoms when they underwent 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET) were followed up for one year using the Hospital Anxiety and Depression Scale (HADS). Fourteen patients who showed high HADS scores and 14 patients who showed low HADS scores were assessed by a psychiatrist 2 years after the PET scan and grouped into the deterioration group (n=10) and the no-change group (n=9). 18F-FDG PET images were analyzed to examine the difference in local brain glucose metabolism between the two groups. RESULTS: The deterioration group showed a decreased glucose metabolism in the right medial frontal gyrus (BA6) and an increased glucose metabolism in the right posterior cingulate (BA29), right anterior cingulate (BA25), left subcallosal gyrus (BA25), and left caudate compared with the no-change group. CONCLUSION: Cancer patients who later developed MDD or adjustment disorder showed regional brain metabolic changes. These regions may be associated with vulnerability to the onset of MDD or adjustment disorder in cancer patients.


Subject(s)
Adjustment Disorders/diagnostic imaging , Blood Glucose/metabolism , Depressive Disorder, Major/diagnostic imaging , Energy Metabolism/physiology , Fluorodeoxyglucose F18 , Image Processing, Computer-Assisted , Imaging, Three-Dimensional , Neoplasms/psychology , Positron-Emission Tomography , Adjustment Disorders/physiopathology , Adolescent , Adult , Aged , Brain/diagnostic imaging , Brain/physiopathology , Cerebral Cortex/diagnostic imaging , Cerebral Cortex/physiopathology , Depressive Disorder, Major/physiopathology , Disease Progression , Female , Humans , Male , Middle Aged , Neoplasms/diagnostic imaging , Nerve Net/diagnostic imaging , Nerve Net/physiopathology , Personality Inventory , Sensitivity and Specificity
4.
Breast Cancer ; 8(3): 254-8, 2001.
Article in English | MEDLINE | ID: mdl-11668251

ABSTRACT

A 67-year-old woman with angiosarcoma of the left breast is presented. Physical findings showed a hard mass in the left breast with skin discoloration and erythema. Mammography showed a high density shadow in the mass without microcalcification and spicula. On ultrasonography, a hypoechoic mass with an ill-defined boundary was detected. On MRI, the tumor had low signal intensity on T1-weighted images, and higher signal intensity on T2-weighted images. MRI with Gd-DTPA images showed higher signal intensity on T1-weighted images with relatively lower intensity in the central area of the tumor. The artery supplying the tumor derived from the left inner thoracic artery and was visualized on three-dimensional dynamic MRI angiography. Initially misdiagnosed as inflammatory breast cancer, an arterial injection of CPA (100 mg) and 5-FU (500 mg) had been performed preoperatively. The definitive diagnosis of angiosarcoma was established by intraoperative frozen section examination. She underwent modified radical mastectomy and is now free of recurrence. This case emphasizes the difficulties in the clinical diagnosis of angiosarcoma of the breast.


Subject(s)
Breast Neoplasms/pathology , Hemangiosarcoma/pathology , Aged , Breast Neoplasms/diagnostic imaging , Breast Neoplasms/surgery , Diagnosis, Differential , Female , Hemangiosarcoma/diagnostic imaging , Hemangiosarcoma/surgery , Humans , Magnetic Resonance Angiography , Mammography
5.
Magn Reson Imaging ; 18(4): 411-5, 2000 May.
Article in English | MEDLINE | ID: mdl-10788718

ABSTRACT

Papillary transitional cell carcinoma of the bladder has a loose connective tissue stalk. For staging of bladder cancer on magnetic resonance imaging (MRI), it is important to clearly separate the cancer from the bladder wall. It is possible to distinguish a stalk from the cancer by the difference of intensity on the using MRI. Sixteen stalks of 20 polypoid bladder tumors on any of the T(2)W(I), dynamic images and delayed enhanced images were demonstrated. Most of the stalks show lower signal intensity than the tumors on T(2)W(I), less enhancement on dynamic images and stronger enhancement on delayed enhanced images. The stalk consisted of fibrous connective tissue, capillary blood vessels, inflammatory cell infiltration and edema. This stalk extended from the bladder wall to the center of the tumor. Some of the superficial muscular bundles were pulled into the stalk. These histopathological findings were compatible with the patterns of signal intensities on MRI. The identification of the stalk of a polypoid tumor may be an important observation to exclude bladder wall invasion by tumor.


Subject(s)
Carcinoma, Transitional Cell/pathology , Magnetic Resonance Imaging , Urinary Bladder Neoplasms/pathology , Aged , Aged, 80 and over , Carcinoma, Transitional Cell/diagnosis , Female , Humans , Male , Middle Aged , Urinary Bladder/pathology , Urinary Bladder Neoplasms/diagnosis
6.
Nihon Igaku Hoshasen Gakkai Zasshi ; 59(13): 760-4, 1999 Nov.
Article in Japanese | MEDLINE | ID: mdl-10614107

ABSTRACT

Table-moving contrast-enhanced MR angiography (MRA) was performed in 14 cases of abdominal aortic aneurysm to evaluate its clinical usefulness. In all cases, aneurysms were clearly demonstrated and image quality was clinically acceptable. Findings of reconstructed MRA were highly consistent with those of DSA, and thrombosed areas were confirmed on source images. Main aortic branches including renal arteries, common iliac arteries, and internal and external iliac arteries were readily identified on reconstructed MRA and/or source images. Additional findings such as thoracic aortic aneurysm (n = 1), common iliac aneurysm (n = 6), external iliac aneurysm (n = 1), internal iliac aneurysm (n = 1), femoral arterial obstruction (n = 2), and femoral arterial stenosis (n = 4) were also detected. Although table-moving MRA may have disadvantages like reduced blood signal and limited spatial resolution compared with the conventional contrast-enhanced technique, the images that were obtained provided sufficient contrast and resolution for preoperative evaluation. Because abdominal aortic aneurysm is accompanied by various arterial abnormalities in many of the large arteries, table-moving MRA was considered a suitable technique for comprehensive assessment.


Subject(s)
Aortic Aneurysm, Abdominal/diagnosis , Image Enhancement , Magnetic Resonance Angiography/methods , Aged , Contrast Media/administration & dosage , Female , Humans , Magnetic Resonance Angiography/instrumentation , Male , Middle Aged
7.
Nihon Igaku Hoshasen Gakkai Zasshi ; 59(9): 473-5, 1999 Aug.
Article in Japanese | MEDLINE | ID: mdl-10487061

ABSTRACT

The bone marrow of the whole body was imaged by MRI in five normal volunteers. The fast short tau inversion recovery (STIR) sequence and sequential imaging using a moving-table system made sagittal and coronal whole body marrow imaging possible within an examination time of 10 minutes. The images obtained showed high resolution and reflected normal red and yellow marrow distribution in all subjects. Additional abnormalities including humeral bone cyst, hepatic cavernous hemangiomas, and maxillary retention cyst were detected. Fast STIR with the table-moving technique was considered a suitable method for rapid bone marrow survey.


Subject(s)
Bone Marrow/anatomy & histology , Magnetic Resonance Imaging/methods , Adult , Bone Cysts/diagnosis , Bone Marrow/pathology , Female , Hemangioma, Cavernous/diagnosis , Humans , Humerus , Image Enhancement/methods , Jaw Cysts/diagnosis , Liver Neoplasms/diagnosis , Male , Maxillary Diseases/diagnosis
8.
Radiat Med ; 16(4): 301-3, 1998.
Article in English | MEDLINE | ID: mdl-9814427

ABSTRACT

A patient with extrahepatic portal vein aneurysm with massive thrombosis, congenital in nature, is reported. Reconstructed images using curved reformation software and three-dimensional images from helical CT were useful to delineate the shape of the portal vein aneurysm and extension of the thrombi.


Subject(s)
Aneurysm/diagnostic imaging , Portal Vein , Tomography, X-Ray Computed/methods , Venous Thrombosis/diagnostic imaging , Adult , Aneurysm/congenital , Humans , Image Processing, Computer-Assisted , Male
9.
Nihon Igaku Hoshasen Gakkai Zasshi ; 58(6): 293-6, 1998 May.
Article in Japanese | MEDLINE | ID: mdl-9656700

ABSTRACT

The MR signal of sternal bone marrow was examined in 21 normal volunteers using a sagittal STIR sequence. Craniocaudal phase-encoding with a hand-made positioning device effectively eliminated artifacts due to cardiac pulsation. The sternal bone marrow signal could be classified into three patterns based on the signal distribution. The superior segment of the manubrium showed characteristic age-related changes. This method provided high spatial resolution and excellent bone marrow imaging. Knowledge of a normal marrow signal pattern may be useful for the evaluation of hematological disorders.


Subject(s)
Aging/pathology , Bone Marrow/pathology , Magnetic Resonance Imaging/methods , Sternum/pathology , Adult , Aged , Female , Humans , Male , Middle Aged
10.
Nihon Igaku Hoshasen Gakkai Zasshi ; 58(4): 160-2, 1998 Mar.
Article in Japanese | MEDLINE | ID: mdl-9584461

ABSTRACT

Seven patients with suspected recurrent rectal cancer underwent Helical CT using SmartPrep. SmartPrep is a software application developed by GE in which the ROI is placed at the desired level of the aorta prior to contrast injection. Using a low-dose continuous scan, the time density curve was obtained instantly, and the optimal timing of scanning was judged from the curve. Four patients who demonstrated intense enhancement at the anastomotic site had local recurrence. No intense enhancement was observed in these areas on conventional delayed CT. Thus, SmartPrep appears to be useful for the accurate diagnosis of recurrent rectal cancer.


Subject(s)
Image Enhancement/methods , Rectal Neoplasms/diagnostic imaging , Software , Tomography, X-Ray Computed , Aged , Humans , Middle Aged , Neoplasm Recurrence, Local
11.
Nihon Igaku Hoshasen Gakkai Zasshi ; 57(7): 402-6, 1997 Jun.
Article in Japanese | MEDLINE | ID: mdl-9312742

ABSTRACT

This study applied a magnetization transfer contrast method to patients with cerebrovascular disorders. A 1.5T superconducting MR unit was used, and magnetization transfer ratio (MTR) images were calculated by evaluating two paired images before and after off-resonance gradient echo pulse sequences. The normal white matter showed the highest MTRs, CSF the lowest, and gray matter, intermediate. Cerebral ischemic patients showed two patterns according to the chronological stage of the affected area. Lesions in the acute and subacute stages revealed higher transfer rates than those in the chronic stage. Patients with cerebral hemorrhage were divided into three groups: the hyperacute group showed a low transfer pattern; the acute group presented inhomogeneous high transfer rates; and the subacute group showed remarkably low transfer rates. In the acute and subacute ischemic stages, increased macromolecules caused higher MTRs than in the chronic stage. In hemorrhagic groups, low MTRs in subacute hemorrhage reflected the transfer of methemoglobin. High MTRs in acute hemorrhage with rich deoxyhemoglobin suggested increased fibrin, plasma, and serum components of macromolecules. The MTC method provided new chronological information on cerebral hemorrhage, adding to that provided by routine MR images.


Subject(s)
Cerebrovascular Disorders/diagnosis , Image Enhancement/methods , Magnetic Resonance Imaging/methods , Adolescent , Adult , Aged , Brain/pathology , Cerebrovascular Disorders/pathology , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Time Factors
12.
Nihon Igaku Hoshasen Gakkai Zasshi ; 57(6): 344-6, 1997 May.
Article in Japanese | MEDLINE | ID: mdl-9194366

ABSTRACT

Contrast-enhanced three-dimensional MR angiography (MRA) combined with a subtraction technique was performed in six patients with a solid tumors in the head or neck region. Using the subtraction technique, the contrast-to-noise ratio between the internal carotid artery and fat tissue increased from 18.2 +/- 7.4 to 64.7 +/- 30.8. The MRA findings demonstrated both arteries and enhancing tumors with effective background signal suppression, making tumor extension and relation to the arterial branches more evident. The proposed technique is promising for screening arterial abnormalities of the head and neck in patients with solid tumors.


Subject(s)
Head and Neck Neoplasms/diagnosis , Magnetic Resonance Angiography/methods , Humans , Middle Aged , Subtraction Technique
13.
Nihon Igaku Hoshasen Gakkai Zasshi ; 57(5): 271-3, 1997 Apr.
Article in Japanese | MEDLINE | ID: mdl-9164117

ABSTRACT

The aim of this study was to determine the utility of diffusion-weighted echo planar imaging (DW-EPI) for detecting acute and subacute brain ischemic foci less than 2 cm in size. Thirty patients underwent DW-EPI on a 1.5 T superconducting unit using a SE-EPI sequence with an arbitrary pair of Stejskal-Tanner gradients applied along the imaging axes. DW-EPI demonstrated all the mast recent ischemic lesions as areas of decreased diffusion, providing greater conspicuity and larger size than conventional spin-echo imaging. DW-EPI is a promising method to detect within a subsecond early ischemia and reversible ischemic changes that are not demonstrate on routine spin-echo images.


Subject(s)
Brain Ischemia/diagnosis , Echo-Planar Imaging/methods , Acute Disease , Adult , Aged , Aged, 80 and over , Brain Ischemia/pathology , Female , Humans , Male , Middle Aged
14.
Nihon Igaku Hoshasen Gakkai Zasshi ; 55(8): 550-4, 1995 Jul.
Article in Japanese | MEDLINE | ID: mdl-7638049

ABSTRACT

This report presents the feasibility of phase-recordered contrast-enhanced three-dimensional MR angiography in 32 consecutive patients with vascular abnormalities in the chest and abdomen. To suppress motion artifacts due to respiratory corruption, a phase-reordering technique was introduced so that the low frequency components of the phase data were obtained first during the imaging period. Image quality and degree of motion suppression were assessed by four radiologists independently without information on breath-holding time. Abnormalities were detected in 30 cases (93.8%), and their extent was correctly assessed in 28 cases (87.5%). More confident assessment was possible in abnormalities of the pulmonary vessels and thoracic aorta than in those of the abdominal aorta and portal venous system. With phase reordering, more than 20 seconds of breath-holding ensured image quality sufficient to correctly assess the vascular abnormalities. While this technique is easy and requires only single breath-holding, it can provide excellent MRA without slice-to-slice spatial misregistration.


Subject(s)
Aortic Aneurysm, Abdominal/diagnosis , Aortic Aneurysm, Thoracic/diagnosis , Magnetic Resonance Angiography , Aortic Coarctation/diagnosis , Female , Gadolinium DTPA , Humans , Male , Middle Aged , Organometallic Compounds , Pentetic Acid/analogs & derivatives , Respiration
15.
Nihon Igaku Hoshasen Gakkai Zasshi ; 55(4): 222-7, 1995 Mar.
Article in Japanese | MEDLINE | ID: mdl-7746722

ABSTRACT

To suppress image degradation due to respiratory corruption during breath holding, a method of reordering of phase encoding was introduced in three-dimensional MR imaging. Without trade-offs in SNR, CNR, and examination time, the method provided a significant reduction of respiratory motion-induced artifacts both in phantom and in vivo experiments. More than twenty seconds of breath holding ensured acceptable image quality regardless of respiratory motion thereafter. Signal intensity change during data acquisition altered the obtained image contrast compared with that of standard sequential linear phase encoding. This technique can be readily implemented on standard two-and three-dimensional pulse sequences and will improve image quality when a patient cannot hold his/her breath during the whole imaging period.


Subject(s)
Artifacts , Image Enhancement/methods , Magnetic Resonance Imaging/methods , Motion , Respiration/physiology , Humans , Models, Structural
16.
Nihon Igaku Hoshasen Gakkai Zasshi ; 54(14): 1352-8, 1994 Dec 25.
Article in Japanese | MEDLINE | ID: mdl-7596764

ABSTRACT

Using the rapid three-dimensional gradient echo technique (FLASH 18 degrees 10/4) and Gd-DTPA administration, we performed MR angiography (MRA) of the thoracic and abdominal aorta during single or double breath-holding periods. Basic in vitro and in vivo dynamic studies showed that infusion of a relatively low concentration (74 mg Gd/ml) Gd-DTPA solution provided a strong and persistent flow signal for a considerable length of time. Eleven of 12 cases clearly demonstrated MRAs of the aorta and its main branches without respiration-induced motion artifacts, although visualization of secondary and more peripheral branches depended on their size, direction and injection-imaging timing. Although limited spatial resolution and pulsatility-induced ghost artifacts remained as problems to be solved, the ease of this method, short examination time and excellent arteriograms with no need for venous or fat suppression make it clinically acceptable and very promising.


Subject(s)
Magnetic Resonance Angiography/methods , Organometallic Compounds , Pentetic Acid/analogs & derivatives , Respiration/physiology , Adult , Aorta , Artifacts , Gadolinium DTPA , Humans , Image Enhancement/methods , Models, Structural , Motion
17.
Nihon Igaku Hoshasen Gakkai Zasshi ; 54(12): 1136-41, 1994 Oct 25.
Article in Japanese | MEDLINE | ID: mdl-9261192

ABSTRACT

We applied a T1-weighted three-dimensional (3D) magnetization-prepared rapid gradient-echo sequence (MPRAGE) for the detection of intracerebral lesions associated with closed head injuries. Thirty-four patients underwent brain MR imaging on a 1.5 Tesla superconducting MR unit. We applied an MPRAGE sequence, together with spin echo (SE) and gradient echo (GRE) sequences, and evaluated the detectability of lesions with each sequence. A total of 100 intracerebral traumatic lesions (33 cortical contusion, 56 diffuse axonal injury, 11 subcortical gray matter injury) were found. Ninety-seven percent of all lesions were detected on MPRAGE images, and 67% on SE and GRE images. The detectability of lesions in each category was 91%, 98%, and 100% on MPRAGE images, and 88%, 54%, and 73% on either SE or GRE images. 3D MPRAGE is a promising method to detect intracerebral traumatic lesions, particularly those associated with diffuse axonal injury, because of its high quality of contrast and spatial resolution and the capability of image reconstruction in any plane.


Subject(s)
Brain/pathology , Head Injuries, Closed/diagnosis , Image Enhancement/methods , Magnetic Resonance Imaging/methods , Adolescent , Adult , Aged , Child , Female , Humans , Male , Middle Aged , Sensitivity and Specificity
18.
Nihon Igaku Hoshasen Gakkai Zasshi ; 54(8): 801-3, 1994 Jul 25.
Article in Japanese | MEDLINE | ID: mdl-8072872

ABSTRACT

Using a magnetization transfer contrast method (MTC), we evaluated its clinical feasibility for demonstration of hyaline cartilage of the human knee in five normal subjects. MTC images, obtained from a gradient echo sequence with an off resonance pulse, were compared with those without off resonance pulse. Signal to noise ratio (SNR) and magnetization transfer rate (MTR) were analyzed with respect to hyaline cartilage, muscle, fat, joint fluid and background noise. Also, contrast to noise ratios (CNRs) of cartilage and fluid were compared. MTRs were significantly different between cartilage-muscle group and fat-fluid group. The CNRs of cartilage and fluid were increased on MTC images, showing good contrast separation between hyaline cartilage and joint fluid.


Subject(s)
Cartilage, Articular/pathology , Image Enhancement/methods , Knee Joint/pathology , Magnetic Resonance Imaging/methods , Adolescent , Adult , Child , Female , Humans , Male , Middle Aged
19.
Nihon Igaku Hoshasen Gakkai Zasshi ; 54(4): 292-4, 1994 Mar 25.
Article in Japanese | MEDLINE | ID: mdl-8177706

ABSTRACT

To obtain high resolutional renal MR angiogram we combined 3D fast scanning technique with Gd-DTPA infusion and surface coil imaging in seven individuals. 1 x 2 x 4 mm spatial resolution provided excellent renal arterial images although thinner slices suffered from decreased signal to noise ratio and ghost artifacts. Twenty seconds interval between injection and data sampling was considered suitable to obtain sufficient signal of the renal arteries. Its easiness, no x-ray irradiation, and capability of repeating study make this technique promising for screening renal arterial diseases.


Subject(s)
Magnetic Resonance Imaging/methods , Organometallic Compounds , Pentetic Acid/analogs & derivatives , Renal Artery/pathology , Adolescent , Adult , Female , Gadolinium DTPA , Humans , Image Enhancement , Kidney Neoplasms/diagnosis , Male
20.
Nihon Igaku Hoshasen Gakkai Zasshi ; 52(2): 235-7, 1992 Feb 25.
Article in Japanese | MEDLINE | ID: mdl-1561065

ABSTRACT

2D time-of-flight MR angiography was performed in 6 cases of thoracic aortic aneurysm. Oblique saturation pulses were used to suppress the signals of the pulmonary artery and SVC, providing excellent selective MR aortograms. 3 dimensional extension of the aneurysm and its relation with cervical branches were easily assessed. It could be possible to replace invasive aortography by this technique.


Subject(s)
Aortic Aneurysm/diagnosis , Image Processing, Computer-Assisted/methods , Magnetic Resonance Imaging/methods , Aorta, Thoracic , Humans , Middle Aged
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