Abstract:
PURPOSE:Our goal was to assess the utility of different imaging directions in volumetric studies of the heart with MRI, in particular to identify the optimal imaging plane for studies of the right ventricle. METHOD:We examined 12 sets of human four-chamber cadaveric cardiac casts. Gradient echo MRI was performed in four imaging planes: (a) perpendicular to the right ventricular inflow tract; (b) perpendicular to the right ventricular outflow tract; (c) in the left ventricular short axis view; and (d) in the axial view. The volumes of the right ventricle and other cardiac cavities were determined with the method of discs. The true cast volumes were measured with the water displacement technique. The agreement between true and measured volumes and the repeatability of image analysis were determined using the Bland-Altman method. RESULTS:There were no statistically significant differences between the measured and true right ventricular volumes irrespective of the imaging plane. The axial plane gave the smallest mean absolute difference from the true right ventricular volume (3.2 +/-2.2 ml) and also the best repeatability of volume analysis (0.2+/-1.6 ml). However, the other imaging planes performed nearly as well, and the differences across the planes were not statistically significant (p > 0.05). Also, in studies of the left ventricle and left and right atrium, the axial view appeared to give the best results, but differences across the imaging planes remained small. CONCLUSION:The present studies of human cardiac casts suggest that gradient echo MRI is well applicable to right ventricular volume measurements. Imaging the right ventricle in axial planes covering the entire heart gives good agreement with true right ventricular volumes and excellent analysis reproducibility. However, other imaging directions perform nearly as well, and thus selection of the imaging plane may not be of major importance to the accuracy of cardiac volume measurements with MR.
journal_name
J Comput Assist Tomogrjournal_title
Journal of computer assisted tomographyauthors
Jauhiainen T,Järvinen VM,Hekali PE,Poutanen VP,Penttilä A,Kupari Mdoi
10.1097/00004728-199811000-00012subject
Has Abstractpub_date
1998-11-01 00:00:00pages
899-903issue
6eissn
0363-8715issn
1532-3145journal_volume
22pub_type
杂志文章abstract::Magnetic resonance imaging depicts the morphological details of the female pelvis and is useful for evaluating both benign and malignant cervical masses. Clinical assessment of the extent of cervical cancer is crucial in determining the optimal treatment strategy, but clinical staging by itself has limitations. Clinic...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3181ed3090
更新日期:2010-11-01 00:00:00
abstract:OBJECTIVE:The aims of this study were to investigate the ability of contrast-enhanced dual-energy computed tomography (DECT) for assessing regional perfusion in a model of acute lung injury, using dynamic first-pass perfusion CT (DynCT) as the criterion standard and to evaluate if changes in lung perfusion caused by pr...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000815
更新日期:2018-11-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to investigate the utility of a balloon rectal channel catheter (BRCC) in complex anal fistula magnetic resonance imaging (MRI). METHODS:A prospective study was done on 54 patients with clinical diagnosis of complex anal fistula. Eighteen patients had preoperative MRI before and aft...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000400
更新日期:2016-07-01 00:00:00
abstract::The diagnosis of abdominal actinomycosis is difficult because of its relative infrequency and imitation of other diseases. We present four cases in which these difficulties in diagnosis were experienced and show the utility of CT in suggesting this disease. Aspiration, biopsy, and proper culture technique, in conjunct...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198705000-00018
更新日期:1987-05-01 00:00:00
abstract::Fallopian tube carcinoma is an unusual gynecologic malignancy that is rarely diagnosed preoperatively. We report a case of fallopian tube carcinoma occurring in a patient who had undergone a hysterectomy many years previously, in whom findings on computed tomography and ultrasound were highly suggestive of the diagnos...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,评审
doi:10.1097/00004728-200305000-00011
更新日期:2003-05-01 00:00:00
abstract:OBJECTIVE:This study examined the effect of coronary artery calcification score by lifestyle and correlation with coronary artery stenosis in persons who underwent coronary artery computed tomography (CT) angiography among health examinees for heart diseases in Korea. METHODS AND MATERIALS:The study included 506 subje...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000497
更新日期:2017-03-01 00:00:00
abstract::A new head holder for the fixation and repositioning of the patient head in PET, CT, and MR scanners has been designed and tested. With this device, a bidimensional correlation between functional and anatomical brain images can also be obtained. Head fixation and repositioning are achieved using the patient's dental m...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199109000-00034
更新日期:1991-09-01 00:00:00
abstract:PURPOSE:The graphical approach is widely used for the pixelwise determination of local metabolic rate of glucose from dynamic positron emission tomography (PET) data. In its conventional implementation, measured integrals over time frames are used to approximate instantaneous tracer concentrations at midframe times ("m...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200307000-00026
更新日期:2003-07-01 00:00:00
abstract:INTRODUCTION:Stereotactic ablative radiotherapy (SABR) offers a curative treatment for lung cancer in patients who are marginal surgical candidates. However, unlike traditional surgery the lung cancer remains in place after treatment. Thus, imaging follow-up for evaluation of recurrence is of paramount importance. MAT...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000262
更新日期:2015-09-01 00:00:00
abstract:PURPOSE:The purpose of this study was to assess the diagnostic yield of computed tomography (CT)-guided core needle biopsy (CNB) for initial transbronchial biopsy (TBB)-based nondiagnostic lung lesions. METHODS:From January 2014 to December 2017, 101 consecutive patients with initial TBB-based nondiagnostic lung lesio...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000999
更新日期:2020-03-01 00:00:00
abstract::We present a unique case of aggressive osteoblastoma arising from thyroid cartilage. A 52-year-old man presented with a 10 month history of neck discomfort but without frank pain. CT and MR examinations disclosed a well defined mass arising from the thyroid cartilage. This lesion had areas of coarse calcifications and...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199601000-00021
更新日期:1996-01-01 00:00:00
abstract:OBJECTIVE:Sequential computed tomography (CT) technique remains the most common protocol for CT evaluation of the head despite nearly universal adoption of continuous technique for all other body parts. This may be attributable to the belief by radiologists that this technique is superior to helical scanning uniquely f...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000289
更新日期:2015-11-01 00:00:00
abstract:PURPOSE:We have devised, implemented, and tested a technique for creating a comprehensive probabilistic atlas of the human cerebral cortex, based on high-dimensional fluid transformations. The goal of the atlas is to detect and quantify subtle and distributed patterns of deviation from normal cortical anatomy, in a 3D ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199707000-00008
更新日期:1997-07-01 00:00:00
abstract:OBJECTIVE:Dynamic MRI was used to analyze patterns of contrast enhancement in muscle layers in the normal uterine body and to evaluate the depth of myometrial invasion by endometrial carcinoma. MATERIALS AND METHODS:Dynamic MRI was performed in 18 normal volunteers and 22 patients with endometrial carcinoma. Eight of ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199401000-00017
更新日期:1994-01-01 00:00:00
abstract::Chondroblastoma is a rare benign primary bone tumor with generally characteristic plain radiographic features. In some cases, however, the benign nature and the extent of the lesion may not be appreciated using conventional radiography. We report the CT findings of chondroblastoma in three patients. In one patient CT ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198410000-00020
更新日期:1984-10-01 00:00:00
abstract::We describe a patient with a metastatic liver tumor that showed a cordlike shadow traversing the tumor on CT. Histopathologically, this cordlike shadow within the metastatic liver tumor was proved to be an infiltrated portal vein without blood flow surrounded by fibrous tissue. Vascular structures traversing a focal l...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199501000-00026
更新日期:1995-01-01 00:00:00
abstract:PURPOSE:This study was designed to examine the use of quantitative magnetization transfer imaging (MTI) in naturally occurring globoid cell leukodystrophy (GLD) in the Cairn terrier. METHOD:A model of GLD was established via a breeding colony, and a total of seven animals were studied with MTI, including two dogs with...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200003000-00025
更新日期:2000-03-01 00:00:00
abstract::Magnetic resonance imaging was performed in four patients with biopsy proven idiopathic portal hypertension (IPH). The MR images show proximity of medium-sized intrahepatic vessels to each other and to the liver surface in all patients. Small vessels running parallel to the second order branches of the intrahepatic po...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199105000-00011
更新日期:1991-05-01 00:00:00
abstract::We reviewed our clinical experience of the past 1 1/2 years using computed tomography (CT) in cases of suspected renal vein thrombosis; we detected three cases and correctly excluded renal vein thrombosis in an additional three patients. Because of our limited clinical experience, we surgically created left renal vein...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1984-04-01 00:00:00
abstract::The computed tomography (CT) and ultrasound findings in 18 patients (35 kidneys) with non-Hodgkin lymphoma involving the kidneys are presented. Renal involvement was bilateral in 13 patients. The most common presentation was that of multiple intraparenchymal nodules (15 kidneys). Other types of involvement included di...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198304000-00007
更新日期:1983-04-01 00:00:00
abstract::The CT and magnetic resonance (MR) findings in 13 patients with advanced Zollinger-Ellison syndrome are described. In eight patients (62%) one or more primary tumors were found with both methods. All patients with proven liver metastases (n = 7) were identified by MR. Computed tomography was positive in six of these p...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198909000-00013
更新日期:1989-09-01 00:00:00
abstract:PURPOSE:Pseudolesions are sometimes seen around the falciform ligament, around the gallbladder, or at the posterior edge of the medical segment on CT during arterial portography. The purpose of this study was to investigate the influence of liver cirrhosis on these pseudolesions. METHOD:The basis of this study was 33 ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199611000-00008
更新日期:1996-11-01 00:00:00
abstract:PURPOSE:Information regarding prostate blood flow as determined by positron emission tomography (PET) with H 0 may provide useful information about tumor diagnosis; however, PET requires a cyclotron for the production of an extremely short half-life (2 minutes) tracer. Therefore, the aim of this study was to propose a ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200207000-00005
更新日期:2002-07-01 00:00:00
abstract::This article will familiarize the reader with useful tools and trouble-shooting tips for web-based conferencing. Radiology-based scenarios for web conferencing are also provided. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000001072
更新日期:2020-07-01 00:00:00
abstract:OBJECTIVES:To evaluate the efficacy of test injection technique using a monitoring scan at knee level for 64-slice multidetector row computed tomographic (MDCT) angiography of the abdominal and lower extremity arteries. METHODS:The test injection technique using low-dose serial CT scan at knee level was performed for ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3181674063
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVE:Our objective was to determine and report the CT findings in patients with diffuse pulmonary lymphangiomatosis (DPL). MATERIALS AND METHODS:We retrospectively reviewed the CT findings in eight patients with pathologically proven DPL. The patients ranged in age from 3 to 35 years (mean 15 years) and included ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199505000-00002
更新日期:1995-05-01 00:00:00
abstract::The article presents a case of subacute coronary artery thrombosis investigated by classic methods, coronary angiography, and MRI. T1- and T2-weighted images showed high signal intensity within the lumen of the right coronary artery corresponding to the methemoglobin content of the thrombus. Dynamic sequence images wi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199711000-00020
更新日期:1997-11-01 00:00:00
abstract::Magnetic resonance imaging was evaluated in six patients with primary thyroid lymphoma. Five patients had a solitary localized tumor and one had multiple tumors. These masses showed homogeneous iso- or high intensity compared with the uninvolved thyroid tissue on T1-weighted images and homogeneous high intensity on T2...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199107000-00019
更新日期:1991-07-01 00:00:00
abstract::Computed tomography circumvents many of the problems encountered in the traditional radiographic investigation of mummies. This case report demonstrates that CT provides an improved evaluation of mummification techniques and bony pathology as well as a better capability of characterizing preserved soft tissue. ...
journal_title:Journal of computer assisted tomography
pub_type: 历史文章,杂志文章
doi:
更新日期:1984-10-01 00:00:00
abstract::The use of magnetic resonance (MR) to preoperatively evaluate patients with primary hyperparathyroidism was assessed using a 1.5 T system and surface coil reception. Twenty-five patients with primary hyperparathyroidism were studied before surgical exploration. Axial images, 5 mm thick, were obtained from the thyroid ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198709000-00023
更新日期:1987-09-01 00:00:00