Abstract:
PURPOSE:To prospectively determine the magnetic resonance (MR) signal intensity characteristics of structures of the ampullary region and to assess the potential use of MR imaging in evaluation of the extent of periampullary tumors in resected specimens. MATERIALS AND METHODS:Twenty-five specimens from the ampullary region obtained in four autopsy cases without periampullary tumors and in 21 patients with periampullary tumors were examined with a 1.5-T MR system and a circular surface coil with 5-inch (12.7-cm) diameter. High-spatial-resolution MR images were obtained with field of view of 100 x 100 mm, matrix of 256 x 256 or 512 x 256, and section thickness of 2 mm. MR imaging findings were compared with histopathologic findings. Sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of high-spatial-resolution MR imaging for assessment of tumor invasion into surrounding tissues were evaluated by two radiologists. RESULTS:T1- and T2-weighted MR images clearly depicted normal structures in the ampullary region that included Oddi muscle, duodenal wall, common bile duct, and pancreas; these findings corresponded well with histologic findings. In 20 (95%) of 21 tumors, high-spatial-resolution MR imaging depicted location and extension of periampullary tumors precisely. Sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of high-spatial-resolution MR imaging for assessment of tumor invasion into surrounding tissue were 88%, 100%, 96%, 100%, and 94%, respectively. CONCLUSION:In this study, MR imaging correctly depicted location, extension, and origin of tumor. High-spatial-resolution MR imaging has potential for presurgical staging of tumors in this region.
journal_name
Radiologyjournal_title
Radiologyauthors
Sugita R,Furuta A,Ito K,Fujita N,Ichinohasama R,Takahashi Sdoi
10.1148/radiol.2313030797subject
Has Abstractpub_date
2004-06-01 00:00:00pages
767-74issue
3eissn
0033-8419issn
1527-1315pii
2313030797journal_volume
231pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::Forty-two hypertensive patients with fibromuscular dysplasia who had angiographic evidence of the development of new disease or of the progression of existing disease were studied. Renal arterial disease was classified as medial fibroplasia with aneurysms (12 patients), subadventitial fibroplasia (24 patients), or int...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.139.1.7208940
更新日期:1981-04-01 00:00:00
abstract:PURPOSE:To determine if digital chest images could be compressed in a primary interpretation context without perceived loss of fidelity (below the visually lossless threshold) at transilluminated film or cathode ray tube (CRT) display. MATERIALS AND METHODS:One hundred forty-four posteroanterior radiographs were obtai...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2282011998
更新日期:2003-08-01 00:00:00
abstract::Growth deformities of the distal femur and unusual gait disturbances were observed in four girls who had had neonatal osteomyelitis and septic arthritis. In each case apparent absence or hypoplasia of one of the femoral condyles, as seen on plain radiographs, was associated with marked genu varum or genu valgum. Arthr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.161.2.3763900
更新日期:1986-11-01 00:00:00
abstract::Brain scintiphotography in three patients with the clinical characteristics of adrenal leukodystrophy demonstrated focal areas of increased uptake of the radionuclide. Histological examination of cerebral tissue corresponding to the abnormal foci on the scan revealed sudanophilic leukodystrophy. These findings suggest...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/114.3.667
更新日期:1975-03-01 00:00:00
abstract::Transcolorectal endosonography (TES) with use of both a nonoptic instrument and an echocolonoscope was performed in 91 patients with colorectal carcinomas (61 rectal and 30 colonic). Correlation of results at TES with results of histologic analysis of resected specimens according to the 1987 TNM classification demonst...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.179.1.2006270
更新日期:1991-04-01 00:00:00
abstract:PURPOSE:To evaluate the estimated absorbed radiation doses to the ovaries and skin entrance during uterine artery embolization (UAE) for leiomyomas. MATERIALS AND METHODS:Radiation dose was measured in 20 patients who underwent UAE for leiomyomas. Measurements were obtained by placing lithium fluoride dosimeters both ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.214.1.r00ja24121
更新日期:2000-01-01 00:00:00
abstract::Eccentric muscular actions involve the forced lengthening or stretching of muscles and tend to produce exertional injuries. This study used magnetic resonance (MR) imaging to serially evaluate muscles in five healthy, untrained subjects who performed exhaustive biceps exercise by doing isolated eccentric and concentri...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.179.3.2027970
更新日期:1991-06-01 00:00:00
abstract:PURPOSE:To evaluate clinically suspected Morton neuroma with contrast material-enhanced magnetic resonance (MR) images. MATERIALS AND METHODS:Fifteen patients with clinically suspected Morton neuroma underwent examination with conventional T1- and T2-weighted MR imaging and a combination of fat suppression and adminis...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.189.1.8372200
更新日期:1993-10-01 00:00:00
abstract:PURPOSE:To correlate pulsatility index (PI) and resistive index (RI) measured at early specific intervals after transplantation with 1-year estimated glomerular filtration rate (eGFR) and death-censored transplant survival to assess the long-term prognostic value of these Doppler indexes. MATERIALS AND METHODS:The loc...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10101329
更新日期:2011-04-01 00:00:00
abstract:PURPOSE:To evaluate whether contrast material-enhanced (CE) fast imaging employing steady-state acquisition (FIESTA) can depict the anterior optic pathways in patients with large suprasellar tumors. MATERIALS AND METHODS:Institutional review board approval was obtained. Twenty-eight patients with large suprasellar tum...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12111363
更新日期:2012-09-01 00:00:00
abstract:PURPOSE:To compare the capability to aid prediction of clinical outcome measures, including progression-free survival (PFS) and overall survival (OS), between volumetric estimates from contrast material-enhanced (CE) T1-weighted subtraction maps and traditional segmentation in a randomized multicenter clinical trial of...
journal_title:Radiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1148/radiol.13131305
更新日期:2014-04-01 00:00:00
abstract::Computed tomographic (CT) colonography is a new-generation technique for detecting colorectal neoplasms by using volumetric CT data combined with specialized imaging software. Patient examinations require full colonic preparation, insufflation, and data acquisition with the patient in the supine and prone positions. C...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiology.216.2.r00au47331
更新日期:2000-08-01 00:00:00
abstract::A systems approach was employed to improve results of the single-contrast barium enema examination for detection of colonic polyps. Improvements were made in each of the following areas: radiographic-fluoroscopic equipment, fluoroscopic-television images, screen-film combinations, barium suspensions, examination techn...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.164.2.3602370
更新日期:1987-08-01 00:00:00
abstract::A patent umbilical vein was demonstrated via ultrasound in a patient with portal hypertension. Ultrasonographic differential diagnosis of intra- and juxta-hepatic veins is given, with emphasis on real time ultrasonography. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/120.1.159
更新日期:1976-07-01 00:00:00
abstract::Computed tomography (CT) resulted in a diagnostic accuracy of 89.2% and 96.1% for medial and lateral meniscal lesions, respectively, in 109 patients who underwent surgery after a direct CT study of the knee joint for a clinically suspected meniscal lesion. The meniscal lesions were the only pathologic condition found ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.157.1.3839930
更新日期:1985-10-01 00:00:00
abstract::Online supplemental material is available for this article. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14142264
更新日期:2015-01-01 00:00:00
abstract:PURPOSE:To prospectively evaluate the effect of experience with coronary computed tomographic (CT) angiography on the capability to detect coronary stenoses of 50% or more. MATERIALS AND METHODS:The institutional review board approved the study protocol. All patients gave consent to undergo CT angiography before conve...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2512080384
更新日期:2009-05-01 00:00:00
abstract::Irradiation of the orbit is often associated with substantial dose inhomogeneity resulting from the insertion of lens blocks. We postulated that such dose inhomogeneity, which often exceeds 40%, could be halved by the use of two pairs of wedged beams, one angled in the sagittal plane and the other in the commonly empl...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.156.3.4023250
更新日期:1985-09-01 00:00:00
abstract:PURPOSE:To investigate the histopathologic anatomy of calcium pyrophosphate dihydrate (CPPD) crystal deposition in and around the atlantoaxial joint and the association between CPPD crystal deposition and subchondral cysts, erosions, and fracture involving the odontoid process of the axis. MATERIALS AND METHODS:One ad...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.216.1.r00jl36213
更新日期:2000-07-01 00:00:00
abstract::Percutaneous transaxillary selective coronary arteriography using preshaped catheters is useful in patients who have had aorto-iliac surgery or have clinical evidence of occlusive arterial disease of the lower extremities. For safety and ease of performance it compares favorably with the percutaneous transfemoral meth...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/114.3.732
更新日期:1975-03-01 00:00:00
abstract::Multisection, dual-echo magnetic resonance (MR) transaxial images of blood vessels contain both anatomic and qualitative information about flow. Even so, the images are produced as a series of two-dimensional tomographic sections from which full visualization of connected structures is difficult. A computer algorithm ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.157.3.4059560
更新日期:1985-12-01 00:00:00
abstract::Epidemiologic data were obtained to evaluate potential risks from exposure to the static and time-varying magnetic fields used in magnetic resonance (MR) imaging. A questionnaire sent to women workers in more than 90% of clinical MR facilities in the United States addressed menstrual-reproductive experiences, work act...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.187.2.8475280
更新日期:1993-05-01 00:00:00
abstract::Percutaneous transperitoneal fine-needle lymph-node biopsy was performed in 52 patients to establish a diagnosis of metastatic disease in nodal defects detected during lymphography. The procedure was found to be highly accurate, with few false-negatives and no false-positives. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/131.3.647
更新日期:1979-06-01 00:00:00
abstract::Evaluation of graft patency following reconstructive venous surgery may be difficult, especially in patients in whom a distal arteriovenous fistula has been constructed. We describe a method of visualizing these venous bypass grafts using digital subtraction angiography that is easy and provides satisfactory results. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.160.1.3520650
更新日期:1986-07-01 00:00:00
abstract:PURPOSE:To investigate contralateral breast biopsy histologic findings in women with breast cancer. MATERIALS AND METHODS:Histologic findings in 237 patients with breast cancer who underwent contralateral breast biopsy for clinically or mammographically detected abnormalities were retrospectively reviewed. Malignant f...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.203.3.9169690
更新日期:1997-06-01 00:00:00
abstract::Magnetic resonance (MR) imaging and computed tomography (CT) were used to study severe syringomyelia, in which the syrinx was so eccentric relative to the center of the spinal cord that at initial examination it appeared to be an exophytic extramedullary mass, in five of six patients with type 2 Arnold-Chiari malforma...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.183.1.1549680
更新日期:1992-04-01 00:00:00
abstract::Twenty cases of methadone-induced pulmonary edema confirmed by clinical, laboratory and roentgenographic findings were extensively reviewed and the roentgenographic manifestations defined in terms of patterns, distribution, and duration of the process. Drug tolerance is a major factor in determining the severity of to...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/114.1.51
更新日期:1975-01-01 00:00:00
abstract:PURPOSE:To assess the diagnostic performance of various Doppler ultrasonographic (US) vascularity measures in conjunction with grayscale (GS) criteria in differentiating benign from malignant breast masses, by using histologic findings as the reference standard. MATERIALS AND METHODS:Institutional Review Board and HIP...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2492060888
更新日期:2008-11-01 00:00:00
abstract::In the early years of nuclear medicine, physicians explored applied nuclear physics, and physicists pursued uncharted areas in medicine. Reflections from Jim Adelstein, MD, PhD, John McAfee, MD, Henry Wagner, MD, Fred Bonte, MD, Dave Kuhl, MD, and Alex Gottschalk, MD, add to the appreciation of the diversity in those ...
journal_title:Radiology
pub_type: 历史文章,杂志文章
doi:10.1148/radiology.214.3.r00mr33623
更新日期:2000-03-01 00:00:00
abstract:PURPOSE:To evaluate a semiflexible ultrasound (US) transducer inserted through a laparoscopic port to image abdominal structures. MATERIALS AND METHODS:Laparoscopic US with a 9.6-mm-diameter, 5.0-7.5-MHz semiflexible transducer with gray-scale, color, and spectral Doppler capabilities was performed in three miniature ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.194.3.7862990
更新日期:1995-03-01 00:00:00