Abstract:
PURPOSE:Our goal was to assess the performance of high resolution CT on breast biopsy specimens before considering the reevaluation of refined CT techniques in patients with breast abnormalities. METHOD:High resolution CT was done in 44 surgical biopsy specimens following conventional X-ray specimen mammography. The specimens comprised 38 palpable and nonpalpable soft tissue abnormalities with mean size of 19 mm and 6 specimens with clustered microcalcifications only. There were 21 carcinomas, 10 fibroadenomas, and 13 other benign conditions. Evaluation of CT and conventional images was done separately, and a feature-grading list was used to compare the two modalities. RESULTS:In fatty specimens, grading of morphologic features of masses and the confidence to detect a soft tissue abnormality were equal with both techniques. CT significantly improved the confidence to detect a mass in 17 specimens with dense tissue: On a scale of 0-10, the mean score for detection was 3.8 with radiography and 5.8 with CT (p<0.008). For clustered microcalcifications, X-ray was superior to CT. The mean CT attenuation of 18 malignant masses (82 HU) was significantly lower than the mean attenuation of 10 fibroadenomas (131 HU; p = 0.003). CT scans of the American College of Radiology test phantom met the requirements for X-ray accreditation. CONCLUSION:For soft tissue abnormalities, CT specimen mammography performed equally as or better than specimen radiography. These in vitro results suggest potential advantages for increased sensitivity and specificity with CT and justify further investigations.
journal_name
J Comput Assist Tomogrjournal_title
Journal of computer assisted tomographyauthors
Raptopoulos V,Baum JK,Hochman M,Karellas A,Houlihan MJ,D'Orsi CJdoi
10.1097/00004728-199603000-00003subject
Has Abstractpub_date
1996-03-01 00:00:00pages
179-84issue
2eissn
0363-8715issn
1532-3145journal_volume
20pub_type
杂志文章abstract:OBJECTIVE:To study the potential application of magnetic resonance imaging (MRI) for classification of retained placental tissue (RPT) in the uterus postnatally. METHODS:Twenty-two patients with clinically or pathologically proven RPT were studied. RESULTS:The thickness ratio (D1/D2) of invaded (D1) to normal (D2) my...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000791
更新日期:2019-01-01 00:00:00
abstract:PURPOSE:Recently, a new specific organ dose adaption and reduction protocol, or SODAR tool (X-CARE, Siemens Healthcare), which reduces dose to the anterior aspect of the body of patients, was installed on our computed tomographic scanner. The purpose of this pilot project was to evaluate image quality and dose distribu...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e318251ec61
更新日期:2012-05-01 00:00:00
abstract::Magnetic resonance was performed in five patients with obstructive hydrocephalus due to surgically proven colloid cyst of the third ventricle. On T1-weighted images two lesions were homogeneously hyperintense and another homogeneously isointense with the surrounding brain parenchyma. On T2-weighted images these three ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199007000-00005
更新日期:1990-07-01 00:00:00
abstract:PURPOSE:Our goal was to determine the predictive value of coronary artery calcification (CAC) on preoperative CT of the thorax for cardiac complications of noncardiac thoracic surgery. METHOD:Of 117 patients undergoing noncardiac thoracic surgical procedures between January 1, 1993, and June 1, 1995, at our institutio...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199707000-00018
更新日期:1997-07-01 00:00:00
abstract:PURPOSE:Quantitative measurement of change in brain size and shape (e.g., to estimate atrophy) is an important current area of research. New methods of change analysis attempt to improve robustness, accuracy, and extent of automation. A fully automated method has been developed that achieves high estimation accuracy. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200105000-00022
更新日期:2001-05-01 00:00:00
abstract:PURPOSE:To retrospectively investigate the effect of the section thickness used for quantifying dual-energy perfusion computed tomography (DEpCT) during 2- and 3-dimensional evaluation. METHODS:Sixty-six patients (22 males and 44 females; mean age, 59.3 years) suspected of having an acute pulmonary embolism underwent ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000148
更新日期:2014-11-01 00:00:00
abstract::Perinatal insults, including anoxia, may lead to a form of cerebral necrosis designated multicystic encephalomalacia. This common condition is characterized by (a) moderate atrophic ventricular dilatation, (b) intact ventricular walls with thickened subependymal glial layer, (c) multiple cysts of irregular size and sh...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1984-08-01 00:00:00
abstract:PURPOSE:Our goal was to perform a detailed comparison of the relative performances of helical CT (pitches 1.0, 1.5, and 2.0) and conventional (overlapped and nonoverlapped) CT in detailed 3D and MPR musculoskeletal imaging. METHOD:A specially designed bone fragment phantom was imaged with multiple slice thicknesses us...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199701000-00031
更新日期:1997-01-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to optimize chest port contrast injections using stepwise improvements. METHODS:Ex vivo injections were tested. Two hundred scans using power port injections were then evaluated. RESULTS:The highest flow rate was achieved using a 19G access needle, larger diameter tubing, and warme...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000001048
更新日期:2020-11-01 00:00:00
abstract::We report a case of an extramedullary plasmacytoma arising from the nasopharynx. The computed tomographic appearance of this rare tumor is discussed. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198312000-00028
更新日期:1983-12-01 00:00:00
abstract::The magnetic resonance characteristics of 16 intracranial arachnoid cysts were evaluated and several features identified that allowed the differentiation from other cystic lesions. Uncomplicated arachnoid cyst contents respond like CSF to both T1 and T2 weighted sequences. Signal from the contiguous brain is of normal...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198703000-00007
更新日期:1987-03-01 00:00:00
abstract::Of 700 neonates examined by computed tomography (CT) in a 4 years period, 17 were found to have a posterior fossa hemorrhage. Eleven were born at term, and six were premature. Delivery was traumatic in 12 babies. The hematoma was in the subdural space in nine and within the cerebellum in eight. The CT diagnosis of ext...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198102000-00013
更新日期:1981-02-01 00:00:00
abstract::A case of a 26-year-old woman with decreasing vision in her right eye, diplopia, headache, and galactorrhea is presented. Both CT and MR studies showed a large sphenoid fibroosseous lesion that had a ground glass appearance on CT and low-to-intermediate proton density and low T2-weighted and low T1-weighted signal int...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199305000-00032
更新日期:1993-05-01 00:00:00
abstract::High-resolution contrast-enhanced dynamic MRI of the uterus can be performed with the combination of a phased-array multicoil and fast GE techniques. This technique can improve the ability to visualize normal anatomy of the uterus and periuterine tissues, including vascular structures and pelvic ligaments, and to dete...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199809000-00015
更新日期:1998-09-01 00:00:00
abstract::The case of a 75-year-old man with a history of lymphoma, recent upper respiratory tract infection, and a protracted course of encephalopathy is presented. Radiologically, findings were consistent with posterior reversible encephalopathy syndrome. A brain biopsy revealed evidence of endothelial activation, T-cell traf...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3181f31917
更新日期:2011-01-01 00:00:00
abstract:PURPOSE:Typically, the final step in volume registration is the reslicing of the volume of interest. The purpose of this work is to examine the effects of this reslicing on functional MRI (fMRI) data using different interpolation methods. METHOD:Functional whole-brain echo planar imaging (EPI) volumes were resliced us...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199709000-00029
更新日期:1997-09-01 00:00:00
abstract:OBJECTIVE:To prospectively investigate the feasibility of an 80-kilovolt (peak) (kVp) protocol in computed tomographic venography for varicose veins of the lower extremities by comparison with conventional 120-kVp protocol. METHODS:Attenuation values and signal-to-noise ratio of iodine contrast medium (CM) were determ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3182621ea9
更新日期:2012-09-01 00:00:00
abstract::We report a unique case of early-phase Takayasu arteritis in which the vessels demonstrated accumulation of [18F]fluorodeoxyglucose (FDG) on PET scanning. This observation suggests the possible use of FDG-PET for the diagnosis of vasculitis. Early diagnosis of Takayasu arteritis may permit early treatment and possibly...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199901000-00004
更新日期:1999-01-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to evaluate the diagnostic ability of magnetic resonance imaging (MRI) in premenopausal women with G1 endometrial carcinoma. METHODS:Twenty-six patients underwent T2W, diffusion weighted, and dynamic contrast-enhanced 3-T MRI. The degree of myometrial invasion was pathologically cl...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000689
更新日期:2018-05-01 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:PURPOSE:The purpose of our study was to assess the value of additional early arterial phase computed tomography (CT) imaging in the detection of hepatocellular carcinoma (HCC) by comparing three-phase and four-phase imaging by using multidetector row helical CT. METHODS:Twenty-five patients with 33 HCCs underwent four...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200209000-00005
更新日期:2002-09-01 00:00:00
abstract::MRI appearance of adult polyglucosan body disease is described. A 67-year-old man presenting with a chronic progressive degenerative neurologic disorder was found to have marked atrophy of the entire cord, without signal abnormalities on long TR images. Autopsy revealed atrophy of the cord, diffuse gliosis, and numero...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199209000-00028
更新日期:1992-09-01 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
abstract:OBJECTIVE:The aim of this study was to evaluate the prevention of liver ischemic injury by preoperative coil embolization in patients with a replaced hepatic artery scheduled for pancreatectomy with splanchnic artery resection. METHODS:Between July 2009 and May 2012, 4 patients with replaced hepatic artery underwent p...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000325
更新日期:2016-01-01 00:00:00
abstract::A 3% barium paste was used in the CT evaluation of 100 normal and 60 abnormal esophagi. Successful esophageal opacification occurred in 87% of both groups. In cases of extrinsic disease involving the esophagus the contrast medium administration assisted in separating the esophagus from adjacent mass lesions, as well a...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198803000-00004
更新日期:1988-03-01 00:00:00
abstract:OBJECTIVE:Our goal was to assess the accuracy of estimating the time course of the arterial plasma concentration of meglumine iothalamate from cranial CT images of different vascular structures in the brain. MATERIALS AND METHODS:Dynamic CT studies of transcapillary transport in various brain lesions were analyzed. Va...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199405000-00005
更新日期:1994-05-01 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: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:OBJECTIVE:Our goal was to evaluate the role of Gd-enhanced MR in the diagnosis and surgical planning of intraventricular cysticercosis cysts. MATERIALS AND METHODS:Thirty-three patients with intraventricular cysticercosis were evaluated with Gd-enhanced MRI including follow-up studies ranging over time periods from 6 ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199311000-00015
更新日期:1993-11-01 00:00:00
abstract::The Boerhaave syndrome is classically considered a panmural perforation of the distal esophagus secondary to forced vomiting or retching. A variant of the syndrome is described in which only the outer longitudinal muscle layer of the esophagus was torn, and in this case most of the usual radiological findings were abs...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198901000-00029
更新日期:1989-01-01 00:00:00