Abstract:
OBJECTIVE:Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired hemolytic disorder, characterized by hemosiderin deposition in the proximal renal tubules. MATERIALS AND METHODS:We examined six cases of PNH with MRI including gradient echo imaging. RESULTS:On T2- and T2*-weighted imaging a characteristic hypointense pattern was noted in five of six patients with PNH. The extent of the hypointense area roughly correlated with the time elapsed from the latest hemolytic attack. CONCLUSION:T2*-weighted imaging (gradient echo imaging) is superior to T2-weighted imaging in the detection of hemosiderin in the renal cortex because of the higher sensitivity to magnetic susceptibility effect and shorter examination times. On the other hand, reversal of the normal cortical-to-medullary intensity ratio on T1-weighted imaging was not seen in our cases in which we used echo delay times short enough to neglect T2 effects.
journal_name
J Comput Assist Tomogrjournal_title
Journal of computer assisted tomographyauthors
Tanaka YO,Anno I,Itai Y,Abe Tdoi
10.1097/00004728-199309000-00016subject
Has Abstractpub_date
1993-09-01 00:00:00pages
749-53issue
5eissn
0363-8715issn
1532-3145journal_volume
17pub_type
杂志文章abstract::Magnetization transfer (MT) between protons of macromolecules and protons of water molecules is a recently introduced mechanism for tissue contrast in MR imaging. The MT effect is strong in tissues where there is an efficient cross relaxation between macromolecular protons and water protons and where this interaction ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199201000-00004
更新日期:1992-01-01 00:00:00
abstract::To evaluate the efficacy of myocardial T2 values in the assessment of allograft rejection, we performed magnetic resonance (MR) imaging at 0.5 T serially in seven cardiac transplant recipients and singly in seven normal volunteers. Cardiac-gated multi-echo spin echo images were obtained; T2 values were estimated by a ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199001000-00012
更新日期:1990-01-01 00:00:00
abstract::In a patient who presented with pelvic pain and changed bowel habits, barium enema and sigmoidoscopic examinations demonstrated a nonspecific asymmetric narrowing of the colon at the rectosigmoid junction with normal mucosal appearance. Computed tomography revealed the etiology to be retroperitoneal fibrosis with pelv...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198801000-00035
更新日期:1988-01-01 00:00:00
abstract::Coronary artery disease is currently the largest killer in the western world, and is estimated to become the leading cause of death worldwide by the year 2020. The question therefore is whether magnetic resonance imaging currently has a place in the already extremely well equipped armamentarium of cardiac testing. Alt...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,评审
doi:10.1097/00004728-199911001-00019
更新日期:1999-11-01 00:00:00
abstract:PURPOSE:To investigate the optimal dual-energy reconstruction technique for the visualization of the hepatic arterial system during dual-energy multidetector computed tomographic (MDCT) angiography of the liver. MATERIALS AND METHODS:Twenty-nine nonconsecutive patients underwent dual-energy MDCT angiography of the liv...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000259
更新日期:2015-09-01 00:00:00
abstract:OBJECTIVE:The aims of this study were to evaluate the dependence of diffusion parameters on the b values adopted for intravoxel incoherent motion diffusion-weighted magnetic resonance imaging and to investigate the application value of multiple diffusion parameters obtained from monoexponential and biexponential models...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000569
更新日期:2017-07-01 00:00:00
abstract::Twenty-five patients with nonseminomatous germ cell carcinoma of the testis underwent CT and nuclear magnetic resonance (NMR) of the retroperitoneum followed by radical retroperitoneal lymph node dissection for surgical proof of metastatic disease. Computed tomography correctly predicted the presence or absence of ade...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198408000-00023
更新日期:1984-08-01 00:00:00
abstract::We describe a new multistep procedure for CT fluoroscopy-guided core biopsy, which allows confirmation of the biopsy-sampling trough and the final needle tip position prior to sampling. Twelve lesions measuring < or =2 cm or in close proximity to vital structures were biopsied using commercially available biopsy syste...
journal_title:Journal of computer assisted tomography
pub_type: 临床试验,杂志文章
doi:10.1097/00004728-200003000-00015
更新日期:2000-03-01 00:00:00
abstract:PURPOSE:Our goal was to demonstrate the appearance of phantom tastes and smells (phantageusia and phantosmia, respectively) by use of functional MRI (fMRI) of the brain and to demonstrate the efficacy of drug treatment that inhibited both the subjective presence of these phantoms and the fMRI brain activation initiated...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200001000-00022
更新日期:2000-01-01 00:00:00
abstract::A case of Ebstein anomaly in a 2-day-old newborn is presented. The complementary roles of two-dimensional Doppler echocardiography and magnetic resonance imaging in managing this cardiac malformation are emphasized. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199009000-00032
更新日期:1990-09-01 00:00:00
abstract::Mean lung density (MLD), as determined by a chest computed tomographic sector method, was evaluated in 12 patients with sarcoidosis and diffuse interstitial lung disease. The results demonstrate that MLD in sarcoidosis was -610.9 +/- 57.3 Hounsfield units (HU), significantly different (p less than 0.001) from a contro...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198306000-00003
更新日期:1983-06-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to describe the characteristics of lung cancers in patients with tuberculous fibrothorax or empyema. METHODS:We retrospectively evaluated 138 consecutive patients with a diagnosis of lung cancer combined with fibrothorax (n = 127) or empyema (n = 11) from January 2005 to May 2015. A...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000608
更新日期:2017-09-01 00:00:00
abstract::The clinical and MR features of an alcoholic woman with Wernicke encephalopathy are reported. During the acute stage Gd-diethylenetriamine pentaacetic acid enhanced MR revealed damage of the blood-brain barrier bilaterally and symmetrically adjacent to the third ventricle, cerebral aqueduct, and fourth ventricle. The ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199111000-00034
更新日期:1991-11-01 00:00:00
abstract::Multiple authors have pointed out the difficulty of detecting spondylolysis with lumbar CT. A simple method to detect spondylolysis on lumbar CT is described. Identifying one intact cortical ring for each vertebra absolutely excludes the diagnosis obviating the time-consuming need to search each image looking for posi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1985-07-01 00:00:00
abstract::The preoperative temporal bone CT scans of 13 patients with surgically proven acquired cholesteatoma were retrospectively reviewed for bony erosions and for extension beyond the temporal bone. A correlation with the clinical and surgical findings was also carried out. The CT findings are discussed and illustrated as w...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198505000-00021
更新日期:1985-05-01 00:00:00
abstract::The central dot sign on CT in Caroli disease has been described previously. We describe a patient with the central dot sign who had periductal cysts but did not have Caroli disease. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199011000-00034
更新日期:1990-11-01 00:00:00
abstract::A splenic mass was found in an asymptomatic 76-year-old woman who had been treated with steroids for autoimmune hepatitis. The lesion was found to be hyperechoic on ultrasound examination, hypovascular on angiography, low attenuating on postcontrast computed tomography, isointense to splenic parenchyma on precontrast ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e31815b3ef5
更新日期:2008-11-01 00:00:00
abstract:OBJECTIVE:This cross-sectional study assessed the prognostic implications of computed tomography (CT) coronary artery calcification (CAC), independent of emphysema, in patients with chronic obstructive pulmonary disease (COPD). MATERIALS AND METHODS:Coronary artery calcification and emphysema were assessed on noncontr...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000119
更新日期:2014-09-01 00:00:00
abstract::The CT findings in a case of calcified gastric carcinoma of the mucin-producing type are described. These findings include localized thickening of the gastric wall and multiple tiny calcific nodules within it. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198410000-00044
更新日期:1984-10-01 00:00:00
abstract:OBJECTIVE:Our goal was to clarify the ability of CT to evaluate intramural invasion of gastric cancer. MATERIALS AND METHODS:We reviewed bolus-enhanced CT images performed with orally administered 400-600 ml of water in 59 early gastric cancers and 22 advanced gastric cancers mimicking early gastric cancers macroscopi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199511000-00019
更新日期:1995-11-01 00:00:00
abstract:OBJECTIVE:This study is motivated by the possibility of using computed tomography (CT) to detect early coronary atherosclerosis by the increased CT values within the arterial wall resulting from vasa vasorum proliferation. METHODS:Coronary arteries (n = 5) with early atherosclerotic changes were injected with Microfil...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3181bb0d32
更新日期:2010-03-01 00:00:00
abstract:PURPOSE:On contrast-enhanced hepatic CT, maximum tumor detection of liver metastases from colorectal cancer is achieved at peak hepatic enhancement. We investigated the relationship between injection time of contrast medium and time to peak hepatic enhancement (TPHE) after the end of injection. METHOD:One hundred nine...
journal_title:Journal of computer assisted tomography
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004728-199607000-00025
更新日期:1996-07-01 00:00:00
abstract::We report a case of pulmonary venoocclusive disease in which chest radiography, when supplemented with computed tomography after contrast medium administration, was specific enough to make the diagnosis without resorting to more invasive, potentially dangerous procedures. A brief review of the literature, with emphasi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198408000-00032
更新日期:1984-08-01 00:00:00
abstract:OBJECTIVE:The purpose of the study was to evaluate the safety and efficacy of Gd-BOPTA for liver imaging and to determine the most appropriate clinical dose to administer. METHODS:Gd-BOPTA was administered at a dose of 0.05 (group A), 0.1 (group B), or 0.2 (group C) mmol/kg to 201 patients suspected of having malignan...
journal_title:Journal of computer assisted tomography
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1097/00004728-199911001-00010
更新日期:1999-11-01 00:00:00
abstract::Ovarian fibromatosis is a rare benign nonneoplastic condition with ovarian enlargement in young women and characterized by a proliferation of collagen-producing spindle cells surrounding normal ovarian structures. We reported magnetic resonance findings of a case that the affected ovarian parenchyma with follicles was...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e318157689a
更新日期:2008-09-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to investigate the accuracy of dual-energy computed tomography (DECT) compared with magnetic resonance (MR) imaging for the detection of edema of the mandible. MATERIALS AND METHODS:Fifteen adult Göttingen mini pigs received irradiation to the mandible with an equivalent dose of 0, 2...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000559
更新日期:2017-07-01 00:00:00
abstract::Volume rendering is a visualization technique that has important applications in diagnostic radiology and radiotherapy. A methodology is presented for (a) evaluation of the quantitative accuracy of representation of known objects in volume-rendered scenes and for (b) optimization of the opacity transfer function to ac...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199805000-00020
更新日期:1998-05-01 00:00:00
abstract::A method is outlined for obtaining direct longitudinal computed tomograms of the forearm using a conventional total body scanner. A case is described in which longitudinal scanning helped define a soft tissue tumor of the forearm and thereby assisted in surgical planning. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198102000-00029
更新日期:1981-02-01 00:00:00
abstract:PURPOSE:The purpose of this work was to evaluate the radiologic findings of gastrointestinal (GI) tract involvement in hepatocellular carcinoma (HCC) and to discuss mechanisms of spread. METHOD:Eighteen patients with histologically proven GI tract metastasis in HCC for 4.5 years underwent CT and five also underwent up...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200201000-00014
更新日期:2002-01-01 00:00:00
abstract:PURPOSE:The objectives of the study were to analyze the tumor shrinkage pattern on magnetic resonance imaging (MRI) after neoadjuvant chemotherapy and to evaluate whether there is any difference in shrinkage pattern between pathological responder and nonresponder groups. In addition, we wanted to compare tumor diameter...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e318246abf3
更新日期:2012-03-01 00:00:00