Abstract:
:In vivo attenuation values of 19 fluid collections in 17 patients were compared with in vitro values obtained on examination of the aspirated fluids within the calibration phantom of an EMI CT5005 body scanner. While the in vitro values showed a 5.2 Hounsfield unit (HU:1,000 scale). difference between cysts and abscesses, spectral errors of up to 28.6 HU were sufficiently large for this distinction to be lost in vivo. Good correlation was found between ascitic fluid protein concentration and in vitro attenuation values, but not with in vivo values. An experimental reconstruction program appeared to give more accurate in vivo results than the standard commercial algorithm. A water control showed errors of similar magnitude to those with the fluid collections and did not provide any simple correction for the errors in the fluid attenuation values. Similar results were found for urine examined in vitro and in vivo. The administration of intravenous contrast agents tended to elevate in vivo fluid attenuation values, but refrigeration for 6 months produced little change in in vitro values.
journal_name
J Comput Assist Tomogrjournal_title
Journal of computer assisted tomographyauthors
Bydder GM,Kreel Ldoi
10.1097/00004728-198004000-00002subject
Has Abstractpub_date
1980-04-01 00:00:00pages
145-50issue
2eissn
0363-8715issn
1532-3145journal_volume
4pub_type
杂志文章abstract:OBJECTIVE:The objective was to elucidate clinical effectiveness of submillimeter multislice 2- and 3-dimensional computed tomography (CT) for diagnosis of congenital middle ear anomaly. MATERIALS AND METHODS:Preoperative CT and operative findings were retrospectively analyzed in 36 ears of 33 patients. The distance be...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000093
更新日期:2014-09-01 00:00:00
abstract:PURPOSE:The aim of our study was to evaluate the effectiveness of additional coronal images using low-milliamperage multidetector-row computed tomography (CT) in the diagnosis of bronchiectasis. METHODS:Helical volumetric CT scans (120 kVp, 70 mA, 2.5-mm collimation, table speed of 15 mm/s, table rotation time of 1 se...
journal_title:Journal of computer assisted tomography
pub_type: 临床试验,杂志文章
doi:10.1097/00004728-200307000-00006
更新日期:2003-07-01 00:00:00
abstract:OBJECTIVE:This study was aimed to evaluate the accuracy of "True Fast Imaging with Steady-State Precession" (TrueFISP) MR angiography (MRA) for diagnosis of renal arterial stenosis (RAS) in hypertensive patients. METHODS:Twenty-two patients underwent both TrueFISP MRA and contrast-enhanced MRA (CE-MRA) on a 1.5-T MR i...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,随机对照试验
doi:10.1097/RCT.0000000000000094
更新日期:2014-09-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to investigate the image quality and diagnostic performance of model-based iterative reconstruction (MBIR) for hepatic vessel evaluation on low-tube-voltage (100 kilovolt [peak]) liver computed tomography (CT) for living donors. METHODS:Fifty-one liver donor candidates (low-ki...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3182ab6cc0
更新日期:2014-05-01 00:00:00
abstract:PURPOSE:The purpose of the study was to investigate the magnetic resonance imaging findings of decidualized endometriotic cysts in comparison with endometriotic cysts associated with ovarian cancers. METHODS:Eighteen decidualized endometriotic cysts and 24 ovarian cancers were retrospectively assessed on height, signa...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000136
更新日期:2014-11-01 00:00:00
abstract:OBJECTIVE:To test 2 hypotheses: first, that coronary distensibility can be measured noninvasively using 64-slice computed tomographic angiography (CTA); and second, that the extent of coronary artery disease (CAD) in any individual patient is related to the degree of distensibility detected by CTA. MATERIALS AND METHO...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000068
更新日期:2014-05-01 00:00:00
abstract::An enterogenous cyst of the craniocervical region producing anterior medullary compression is reported. The patient presented with quadriparesis with greater involvement of the upper limbs. Computed tomography showed a high attenuation intradural extramedullary mass located anteriorly. Magnetic resonance imaging demon...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199005000-00030
更新日期:1990-05-01 00:00:00
abstract:OBJECTIVE:The goal of this study was to quantify changes in uterine volume during and after chemotherapy for breast cancer. MATERIALS AND METHODS:Fifty-eight patients (mean age 42 years) with advanced breast cancer undergoing treatment with FLAC (5-fluorouracil, leucovorin, Adriamycin, and cyclophosphamide) were studi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199507000-00016
更新日期:1995-07-01 00:00:00
abstract:OBJECTIVE:Optic nerve glioma is a common finding in patients with neurofibromatosis type 1 (NF-1). Although dural ectasia of the optic nerve is encountered rarely, it has to be considered in the differential diagnosis. MATERIALS AND METHODS:Three patients affected by NF-1 were examined sequentially by CT and MRI. RES...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199409000-00009
更新日期:1994-09-01 00:00:00
abstract:PURPOSE:The purpose of this work was to evaluate the helical CT and CT angiography (CTA) findings of anomalous systemic artery (ASA) to the basal segments of the left lower lobe (LLL). METHOD:Three patients (two had hemoptysis, one was asymptomatic) with blotchy nodular density in the LLL revealed on chest radiographs...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200011000-00026
更新日期:2000-11-01 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::The purpose of this 4-part series is to demonstrate the high-resolution axial and coronal anatomy of temporal bone from a flat-panel detector-based volume computed tomography (CT) scanner (parts I and II); these imaging planes are then used to outline the effect of different surgical procedures commonly applied to the...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/01.rct.0000171239.18301.96
更新日期:2005-07-01 00:00:00
abstract::We retrospectively evaluated 10 patients with pathologically proven fibrolamellar hepatocellular carcinoma (FLHCC) to assess the utility of CT (n = 9), ultrasound (n = 10), angiography (n = 9), and MR (n = 3). The tumors were solitary in 6 of 10 patients, well delineated in 7 of 10, and hypervascular in 8 of 10. With ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199107000-00001
更新日期:1991-07-01 00:00:00
abstract::Seven cases of Poland syndrome were investigated with CT and/or MR to assess the extent of the muscle abnormalities of the shoulder girdle. In all cases the absence of the sternocostal head of the pectoralis major was clearly shown, as were any associated abnormalities of the pectoralis minor, serratus anterior, and l...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199205000-00019
更新日期:1992-05-01 00:00:00
abstract::In a case of cerebral infarction the lesions were isointense to slightly hyperintense in the T2-weighted MR images obtained approximately 2 weeks after the onset. Earlier (1 week after onset), they had been markedly hyperintense. The probably mechanisms behind this phenomenon, referred to as "MR fogging" are discussed...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199101000-00029
更新日期:1991-01-01 00:00:00
abstract::Dialysate leakage into subcutaneous tissues occurs not uncommonly in patients on continuous ambulatory peritoneal dialysis. When the leakage site cannot be localized clinically, CT with intraperitoneal contrast medium administration may localize the site. We report our experience with three cases in which this techniq...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198703000-00016
更新日期:1987-03-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to investigate the causes of apparent diffusion coefficient (ADC) measurement errors and to determine the optimal scanning parameters that are independent of the field strength and vendors of the magnetic resonance (MR) system. MATERIALS AND METHODS:Brain MR images of 10 healthy volu...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000266
更新日期:2015-09-01 00:00:00
abstract:PURPOSE:The purpose of this work was to assess the activation of the supplementary motor area (SMA) during simple motor, complex motor, hot sensory, and touch sensory tasks. METHOD:Functional MRI (fMRI) was performed in eight right-handed healthy volunteers. There were four tasks: simple motor, complex motor, hot sens...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200007000-00002
更新日期:2000-07-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to define the range of abnormalities and to assess the contribution of high-resolution CT (HRCT) in the evaluation of miliary tuberculosis involving the lung parenchyma. MATERIALS AND METHODS:The authors retrospectively reviewed HRCT scans of 11 patients with microbiologically o...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199411000-00003
更新日期:1994-11-01 00:00:00
abstract::A hepatic specific contrast agent was used in an attempt to detect a biopsy-proven hepatoma. This lesion had been missed by routine computed tomography and was poorly detected with the hepatic specific contrast agent EOE 13. It was also poorly detected by technetium-sulfur colloid hepatic scintigraphy. The true extent...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198310000-00032
更新日期:1983-10-01 00:00:00
abstract::We report a case of nocardia choroid plexitis with extension into the parenchyma of the left parietal lobe in a previously well 13-year-old girl. The neuroimaging findings mimicked those of an intracranial neoplasm. This case illustrates the importance of including infectious etiologies in the differential diagnosis o...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199405000-00025
更新日期:1994-05-01 00:00:00
abstract:PURPOSE:The aim of this study was to investigate the role of dynamic contrast-enhanced magnetic resonance imaging (MRI) in evaluation of blood flow changes related to transarterial chemoembolization (TACE) and radiofrequency ablation (RFA) procedures in patients with hepatocellular carcinoma (HCC) lesions. METHODS:Fif...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000427
更新日期:2016-09-01 00:00:00
abstract::We present a case of a solitary cardiac metastasis from a malignant fibrous histiocytoma of the scalp. Magnetic resonance imaging improved the preoperative assessment and provided accurate information regarding the extent of the metastatic processes. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198901000-00028
更新日期:1989-01-01 00:00:00
abstract:OBJECTIVE:To describe the thin-section computed tomography (CT) findings of Sjogren syndrome accompanying pulmonary amyloidosis and lymphoproliferative disease and to compare these with histopathologic findings. SUBJECTS AND METHODS:The thin-section CT findings of 5 women (age range: 42-59 years, mean age=50 years) wi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200411000-00008
更新日期:2004-11-01 00:00:00
abstract::Gas formation as a result of transcatheter tumor embolization has recently been observed by conventional radiography. We report the computed tomography identification of similar benign gas formation following transcatheter embolization of a large adrenal carcinoma. Computed tomography should be the most sensitive meth...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1979-12-01 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 objective of the study was to characterize the enhancement pattern of hyperfunctioning parathyroid adenomas on multiphase multidetector computed tomography (CT) or 4-dimensional CT. METHODS:We retrospectively studied the enhancement patterns of 48 pathologically confirmed parathyroid adenomas with 4-dime...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e31822a1e70
更新日期:2011-09-01 00:00:00
abstract:OBJECTIVE:Magnetic resonance imaging has proven to be a useful diagnostic tool for the evaluation of various types of vascular rings and congenital heart disease. We report two cases showing the accuracy of MRI in detecting post-surgical complications in patients with these conditions. MATERIALS AND METHODS:The two ca...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199401000-00008
更新日期:1994-01-01 00:00:00
abstract::To evaluate the ability of gradient echo MR to define the vacuum phenomena, 14 cadaveric lumbar spines were imaged by spin echo and gradient echo MR, CT, and plain radiography following injection of varying amounts of air into the intervertebral disks. Gradient echo MR was more sensitive than spin echo MR or plain rad...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199103000-00008
更新日期:1991-03-01 00:00:00
abstract:PURPOSE:This study aimed to develop an automated, quantitative method to increase the likelihood of identifying and preventing such air-in-oil (AIO) artifact. METHODS:A 1-dimensional radial representation of the 2-dimensional noise power spectrum (NPS) was calculated from AIO artifact images and compared with artifact...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000770
更新日期:2019-01-01 00:00:00