No abstract available.
Carcinoma, Hepatocellular*

The authors defined precaval retropancreatic space as the space between pancreatic head with portal vein and IVC analyzed the CT findings of this space to know the normal structures and size in this space, We evaluated 100 cases of normal anbdominal CT scan to find out normal anatomic structures of precaval retropancreatic space retrospectively. We also measured the distance between these structures and calculated the minimum, maximum and mean values. At the splenoportal confluence level, normal structures between portal vein and IVC were vessel (21%), lymph node (19%), and caudate lobe of liver (2%) in order of frequency. The maximum AP diameter of portocaval lymph node was 4mm. Common bile duct(CBD) was seen in 44% and the diameter was mean 3mm and maximum 11mm. CBD was located in extrapancreatic (75%) and lateral (60.6%0 to pancreatic head. At IVC-left renal vein level, the maximum distance between CBD and IVC was 5mm and the structure between posterior pancreatic surface and IVC was only fat tissue. Knowledge of these normal structures and measurement will be helpful in differentiating pancreatic mass with retropancreatic mass such as lymphadenopathy.
Bile ; Head ; Liver ; Lymph Nodes ; Lymphatic Diseases ; Portal Vein ; Renal Veins ; Retrospective Studies ; Tomography, X-Ray Computed

No abstract available.
Humans ; Infant, Newborn*

A characteristic sonographic pattern that suggest a bowel lesion, called "Pseudokidney Sign" because itresembles the ultrasonic appearance of the kidney
Barium ; Gastrointestinal Diseases ; Kidney ; Mucous Membrane ; Mucus ; Neoplasm Metastasis ; Ultrasonics ; Ultrasonography

The authors experience 3 cases of angiographically occult vascular malformation(AVOM) of the brain during the last 3 months in 1990. All cases were diagnosis of either operative or pathological finding and were associated with intracerebral hemorrhage. The authors recommend that surgery should be considered even to those angiographically negative intracerebral hemorrhage cases, once clinical features are highly suggestive of AOVM. Surgery can be an effective and define therapy for these entities, which are prone to cause recurrent hemorrhage and persistent neural deficits.
Brain* ; Cerebral Hemorrhage ; Diagnosis ; Hemorrhage ; Magnetic Resonance Imaging ; Vascular Malformations*

The globus symptom is a condition in which a patient, often middle aged women, complains of a lump andchocking sensation in the throat, Functional disturbance of the cricopharyngeal muscle, rendering it incapable ofrelaxing during swallowing, has long been recognized as a cause of globus symptom and dysphagia. We wanted to findout how often and to what extent distrubed relaxation of the cricopharyngeal muscle can be seen in patients withglobus symptom with routine examination and video esophagogram. The results were as follows: 1. Male : femaleratio was 1:2.4. 2. Globus symptom was most frequent in the age group between 30-39 of female. 3. Organic lesionswere seen in 43.6%(24 Pts) of globus patients. 4. Cricopharyngeal muscle was visualized in 29.1%(16Pts), esophageal diverticulum in 3.6%(2 Pts) and degenerative spondylosis in 3.6%(2 Pts). 5. Incidence of visualizationof cricopharyngeal muscle were higher in male group (50%) than female one (20.5%). 6. Cricopharyngeal muscle wasmost frequently visualized on early swallowing phase(12/16 Pts).
Deglutition ; Deglutition Disorders ; Diverticulum, Esophageal ; Female ; Humans ; Incidence ; Male ; Middle Aged ; Pharynx ; Relaxation ; Sensation ; Spondylosis

Ultrasonograms of proven liver abscesses in 44 patients were analysed. In ulltrasonography prior to otherdiagnostic approach, 38 patients(86.4%) were accurately diagnosed as liver abscess with correlation of clinicalsymptoms. The outline of abscess is smoothly defined. oval and round in 19 patients, irregularly and ill-definedin 25 patients. Only in 5 patients echogenic capsules are demonstrated. The internal echogenecity is variable;they are predominantly echo-free in 14, predominantly low-echo in 25 and predominantly echogenic, similar to solidtumor in 2 patients . 36 patients who were treated by medication only and combined needle aspiration had follow-up ultrasonography within 3 weeks since initial treatment. 33 patients were ultrasonically and clinically improved.Only one patients died of sepsis after needle aspiration and 2 patients were discharged without any sign ofimprovement.
Abscess ; Capsules ; Follow-Up Studies ; Humans ; Liver Abscess ; Liver ; Needles ; Sepsis ; Ultrasonography

The purpose of this study was to document the additional value of MR imaging during arterial portography (MRAP) in patients examined with intravenous contrast-enhanced dynamic MR imaging for the assessment of focal lesions in patients with cirrhosis or chronic viral hepatitis. The MR images of 24 patients with 39 hepatocellular carcinomas and 18 benign hepatocellular nodules examined with dynamic MR imaging and MRAP within a 14-day interval were retrospectively reviewed. For 39 hepatocellular carcinomas, MRAP revealed 37 perfusion defects (95%), while dynamic MR imaging demonstrated 35 occurrences of nodular contrast-enhancement (90%) on arterial dominant phases. Among the 11 benign nodules misinterpreted as hepatocellular carcinoma due to their high signal intensities on arterial-dominant phases of dynamic MR imaging, eight (73%) showed intratumoral portal venous perfusion on MRAP and were regarded as benign nodules. As a result of its high sensitivity and its potential ability to enable differentiation of benign and malignant hepatocellular nodules, MRAP can be added to dynamic MR imaging for planning future management in patients with equivocal hepatocellular nodules in the cirrhotic liver.
Adult ; Carcinoma, Hepatocellular/diagnosis ; Comparative Study ; Female ; Gadolinium/diagnostic use ; Hepatic Artery/radiography ; Human ; Liver/pathology* ; Liver Cirrhosis/diagnosis* ; Liver Neoplasms/diagnosis ; Magnetic Resonance Imaging/methods* ; Male ; Middle Age ; Portography

PURPOSE: To compare T2-weighted MR cholangiography (T2-MRC) and contrast-enhanced T1-weighted MRC (enhanced T1-MRC) in the assessment of biliary anatomy in donor candidates for living related liver transplantation (LRLT). MATERIALS AND METHODS: Thirty-three potential donors underwent MR examination for preoperative evaluation. Using the single-shot half-Fourier RARE sequence, T2-weighted single-section and coronal images were obtained, and enhanced T1-MRC was performed, using 3D GRE sequences after the administration of mangafodifir trisodium. To assess the hilar ductal branching pattern and determine diagnostic confidence, two reviewers first evaluated the unpaired T2-MRC and enhanced T1-MRC images, and then paired T2-MRC and enhanced T1-MRC images together. In particular, in 12 cases in which direct cholangiographys were performed, the feasibility of single duct-to-duct anastomosis was assessed using the unpaired and the paired sets sequentially. RESULTS: The reviewers' confidence tended to be higher for enhanced T1-MRC than T2-MRC, but the difference was not statistically significant. For both reviewers, confidence was significantly higher for the paired set than for T2- or enhanced T1-MRC alone (p < .001). The types of biliary anatomy determined in the paired set matched the consensus reading in 33 (100%) and 30 cases(91%) assessed by reviewer 1 and 2, respectively. The separate interpretation of T2- and enhanced T1-MRC findings matched the consensus interpretation in 30 (91%) and 28 cases (85%), respectively, assessed by reviewer 1, and 26 (79%) and 28 cases (85%), respectively, assessed by reviewer 2. The possibility of single anastomosis was accurately predicted in 91.6% of cases in T2-MRC, and 100% at enhanced T1-MRC and the combined set. CONCLUSION: In the evaluation of the biliary anatomy of potential donors for LRLT, the combined use of T2-MRC and enhanced T1-MRC may improve diagnostic confidence and decrease the occurrence of a non diagnostic or equivocal interpretation at T2-MRC alone.
Adult* ; Cholangiography* ; Consensus ; Humans ; Liver Transplantation ; Liver* ; Tissue Donors*

PURPOSE: To compare the ability of tumor detection and the lesion conspicuity between T1- and T2-weighted fast scanning sequences and T1- and T2-weighted conventional spin echo techniques in MR imaging of hepatic tumors. MATERIALS AND METHOD: Hepatic tumors were induced on 13 male Sprague-Dawley rats by feeding 3'-methyl-dimethylethylaminoazobenzene mixed with Miller's III formula for 12 weeks. MR images were obtained with 1.5T magnet with dual TMJ coil(Signa, GE Medical Systems, Milwaukee, USA). Animals were anesthesized with 150mg/kg of ketamine hydrochloride. T2 weighted fast spin echo(FSE), conventional spin echo(CSE) T2- and T1WI, fast multiplanar spoiled gradient recalled(FMPSPGR) imaging were obtained. Number of detected, tumors and contrast-to-noise ratio of the tumors were compared for each sequence. RESULTS: Overall 110 tumors were developed. 75% of the tumors were detected on FSE, 65% on FMPSPGR, 41% on conventional T2WI, and 41% on T1WI images. For tumors more than 5mm in diameter, sensitivity was 88% on FMPSPGR, 65% on conventional T2WI, and 81% on TIWI images respectively. CNR of the tumor was 28.94 +/- 21.6 on FSE, 13.57 +/- 8.64 on FMPSPGR, 12.62 +/- 10.65 on CSE T2WI, and 9.47 +/- 8.05 on CSE TIWI images, which was significantly high on FSE (p<0.05). CONCLUSION: Fast spin echo T2 WI shows highest sensitivity and tumor-to-liver contrast. FMPSPGR imaging is also favorably comparable with conventional T1WI. Therfore, these two pulse sequences can be useful in clinical condition for hepatic MR imaging.
Animals ; Humans ; Ketamine ; Magnetic Resonance Imaging ; Male ; Rats* ; Rats, Sprague-Dawley ; Temporomandibular Joint