Abstract:
PURPOSE:To evaluate magnetic resonance (MR) hydrometry, a method of quantifying fluid amounts by using MR imaging, for assessing the exocrine function of the pancreas after stimulation with secretin. MATERIALS AND METHODS:Images were obtained with a single-shot turbo spin-echo sequence by using a 1.0-T magnet with a quadrature body coil. Image postprocessing and evaluation were performed at an external workstation by using a specially designed histogram algorithm that translates the MR signal intensity of duodenal filling into an actual amount of duodenal fluid. This algorithm was tested in vitro and in vivo. Finally, MR hydrometry results in five patients were correlated with those of the secretin-cerulein test. RESULTS:The phantom measurements showed a high correlation (r = 0.99) between the actual amount of fluid in the imaging volume and the calculated results. In vivo, the ability of MR hydrometry to enable exact quantification of fluid amounts was demonstrated. In correlating the signal intensity of duodenal filling with the exact amount of additional fluid in the duodenum in volunteers, a coefficient of 0.043 gray tones per pixel per milliliter was calculated. The correlation (r) between secretin-stimulated duodenal fluid output estimated by using tube aspiration and that estimated by using MR hydrometry was 0.946 (P <.05). CONCLUSION:MR hydrometry is a promising noninvasive method of assessing fluid output as a measure of exocrine pancreatic function.
journal_name
Radiologyjournal_title
Radiologyauthors
Heverhagen JT,Müller D,Battmann A,Ishaque N,Boehm D,Katschinski M,Wagner HJ,Klose KJdoi
10.1148/radiology.218.1.r01ja2061subject
Has Abstractpub_date
2001-01-01 00:00:00pages
61-7issue
1eissn
0033-8419issn
1527-1315journal_volume
218pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract:PURPOSE:To compare the stress experienced by women who had false-positive screening mammograms and had undergone immediate on-site diagnostic imaging evaluation with that experienced by those who had been recalled for subsequent imaging. MATERIALS AND METHODS:A retrospective survey was mailed to women with false-posit...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.218.1.r01ja35247
更新日期:2001-01-01 00:00:00
abstract::Ultrasound detected cystic intracranial lesions in 18 infants. Lesions included porencephaly (6 infants), hydranencephaly (1 infant), a quadrigeminal cyst (1 infant), Dandy-Walker syndrome (1 infant), and cavum septi pellucidi and Vergae (9 infants). Cystic lesions of the infant brain can be delineated accurately with...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.137.2.6968920
更新日期:1980-11-01 00:00:00
abstract:PURPOSE:To determine the imaging and histopathologic appearance of fractures of the hands and feet in abused infants. MATERIALS AND METHODS:The imaging findings in 11 abused infants with fractures of the hands and feet were examined retrospectively. All 11 infants underwent skeletal surveys; five infants also underwen...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.203.1.9122400
更新日期:1997-04-01 00:00:00
abstract::A basic understanding of shock wave generation is essential for the radiologist who performs gallstone lithotripsy. Shock waves differ from ordinary acoustic waves in that they have a rapid rise time, a positive pressure component that gives rise to compressive forces approaching 1,000 atm, and a low-amplitude sustain...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.178.2.1987600
更新日期:1991-02-01 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 retrospectively compare fusion fluorine 18 fluorodeoxyglucose (FDG) positron emission tomographic (PET)/computed tomographic (CT) imaging with CT imaging alone in the evaluation of yttrium 90 ((90)Y)-ibritumomab tiuxetan radioimmunotherapy treatment of B-cell non-Hodgkin lymphoma. MATERIALS AND METHODS:This...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2463060588
更新日期:2008-03-01 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::Diagnostic quality of radiographs and adverse reactions associated with the use of metrizamide and iohexol as contrast agents in lumbar myelography were compared in a prospective randomized double blind study in 350 patients at seven centers. The contrast media were administered in comparable volumes at a concentratio...
journal_title:Radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1148/radiology.151.3.6371890
更新日期:1984-06-01 00:00:00
abstract::The Kimray-Greenfield filter is a wire cage which is inserted into the inferior vena cava (IVC) to prevent thrombi originating in pelvic and leg veins from embolizing to the lungs. Duplex real-time/pulsed Doppler ultrasound was used to evaluate placement and function in 38 patients (46 examinations). Real-time examina...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.148.1.6856840
更新日期:1983-07-01 00:00:00
abstract::Gadolinium-labeled diethylenetriaminepentaacetic acid was used as a contrast agent for stereotactic magnetic resonance (MR) imaging in six selected patients with brain tumors who underwent stereotactic biopsy. Regions of contrast enhancement demonstrated by computed tomography (CT) and MR imaging in four of the six pa...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.166.3.2829270
更新日期:1988-03-01 00:00:00
abstract:PURPOSE:To compare changes in the concentration of choline-containing compounds (tCho) and in tumor size at follow-up after neoadjuvant chemotherapy (NAC) between patients who achieved pathologic complete response (pCR) and those who did not (non-pCR). MATERIALS AND METHODS:This study was approved by the institutional...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2512080553
更新日期:2009-06-01 00:00:00
abstract::Quantitative microstructural sonography differs from conventional sonography in several ways. The frequency as well as the amplitude of echoes is recorded and assessed using spectral analysis techniques. The effects of diffraction of the ultrasound beam are calibrated, as are the transfer characteristics of the system...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.155.2.2984720
更新日期:1985-05-01 00:00:00
abstract::A double-blind clinical trial was performed in 1,000 consecutive patients to compare the safety and efficacy of intravenously administered nonionic (iohexol) and ionic (metrizoate) urographic contrast media. The patients ranged in age from 10 to 80 years. The incidence of mild to moderate adverse effects was 7.7% with...
journal_title:Radiology
pub_type: 临床试验,杂志文章
doi:10.1148/radiology.167.3.3283830
更新日期:1988-06-01 00:00:00
abstract:PURPOSE:To evaluate the potential of anti-human epidermal growth factor receptor (HER)1- and anti-HER2-targeted radiolabeled antibodies and magnetic resonance (MR) imaging for imaging of orthotopic malignant pleural mesothelioma (MPM) in mouse models. MATERIALS AND METHODS:Animal studies with 165 mice were performed i...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12121021
更新日期:2013-04-01 00:00:00
abstract::Eighteen cases of long-standing rheumatoid arthritis and superimposed pyarthrosis were reviewed to determine the most distinguishing radiographic features. Soft-tissue changes allowed earlier diagnosis in the knee and ankle joints and consisted of large asymmetrical joint effusion and fat-pad edema. Bony articular cha...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/122.1.17
更新日期:1977-01-01 00:00:00
abstract:PURPOSE:Fast-neutron irradiation and boron-neutron capture therapy (BNCT) have been independently investigated as treatments for malignant disease. This study tested the feasibility of enhancing fast-neutron irradiation with concomitant BNCT. MATERIALS AND METHODS:Seventeen male Fisher rats, each weighing 180-200 g an...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.191.3.8184080
更新日期:1994-06-01 00:00:00
abstract:PURPOSE:To determine the diagnostic performance of magnetic resonance (MR) elastography in comparison to spleen length and dynamic contrast material-enhanced (DCE) MR imaging in association with esophageal varices in patients with liver cirrhosis by using endoscopy as the reference standard. MATERIALS AND METHODS:This...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14130916
更新日期:2014-07-01 00:00:00
abstract::An ex vivo magnetic resonance (MR) colonographic system with a bovine colon with polyps of predetermined dimensions was developed for evaluation and optimization of different combinations of imaging sequences and intraluminal contrast agents. Findings were then applied during in vivo testing in human subjects. The res...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2251011664
更新日期:2002-11-01 00:00:00
abstract::Multiple renal arteries originating from the aortoiliac vessels were identified angiographically in 44% of 444 prospective renal donors. Bilateral multiple renal arteries were identified in 12%. With good immunological donor-recipient matching, 17 kidneys with multiple renal arteries were transplanted with excellent r...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/133.1.45
更新日期:1979-10-01 00:00:00
abstract::Endoleaks were detected with helical computed tomographic (CT) angiography in five patients after placement of an aortobiliac stent-graft. The leaks were subsequently evaluated with duplex ultrasonography (US) and, in four patients, with conventional aortography as well. CT angiography revealed a total of seven endole...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2253011806
更新日期:2002-12-01 00:00:00
abstract::Acentric chromosome fragments produced in cells by irradiation or other agents give rise to micronuclei in daughter cells. The micronuclei can be counted readily in large numbers of cells which provides a sensitive measure of chromosome aberrations. Previous studies have shown that the presence of contrast material en...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.136.1.7384520
更新日期:1980-07-01 00:00:00
abstract::The radiological features of absence of a pulmonary artery are often characteristic enough to allow a diagnosis based on the plain radiograph. They include a small hemithorax, ipsilateral displacement of the mediastinum, absence of the corresponding pulmonary artery, and reticular parenchymal densities, generally attr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/132.2.281
更新日期:1979-08-01 00:00:00
abstract:PURPOSE:To retrospectively determine the value of adding qualitative and quantitative axial diffusion-weighted (DW) imaging to standard spine magnetic resonance (MR) imaging to differentiate between acute osteoporotic and malignant compression fractures at 3.0 T. MATERIALS AND METHODS:The institutional ethics committe...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.13130399
更新日期:2014-05-01 00:00:00
abstract::Thirty patients underwent 16-section multi-detector row computed tomographic (CT) angiography of the thorax with retrospective electrocardiographic gating. Institutional review board approval was obtained for retrospective analysis of CT scan data and records; patient informed consent was not required. Images reconstr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2333030826
更新日期:2004-12-01 00:00:00
abstract:PURPOSE:To describe magnetic resonance (MR) imaging features in patients with proved pilonidal sinus disease and to compare these features with those in a matched group of patients with proved fistula in ano to determine the accuracy with which MR imaging can be used to distinguish between the two diseases. MATERIALS ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2263011758
更新日期:2003-03-01 00:00:00
abstract::Technetium-99m gamma camera images of kidneys produced with an iodine-131 energy window showed "ghosts" over and between the kidneys and between the kidneys and the bladder. The cause was coincidence summing at 281 keV due to a high 99mTc counting rate. In older model cameras careful peaking with a proper energy windo...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.146.2.6849100
更新日期:1983-02-01 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::In his overview of the history and theoretical developments of radiotherapy, the author stresses the following concepts: (a) sensitivity is not linked to histology but to the volume of cancer; (b) the dose must not necessarily be homogeneous in the target volume but related to varying volumes of cancer; (c) the fact t...
journal_title:Radiology
pub_type: 历史文章,杂志文章,评审
doi:10.1148/127.1.3
更新日期:1978-04-01 00:00:00
abstract:PURPOSE:To assess the decisions made by uroradiologists regarding choice of type of intravenous contrast material (low-osmolar contrast media [LOCM] vs conventional ionic agents) and frequency of use of corticosteroid prophylaxis. MATERIALS AND METHODS:A questionnaire was mailed to 158 members of the Society of Urorad...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.194.2.7824710
更新日期:1995-02-01 00:00:00
abstract:PURPOSE:To evaluate the clinical relevance of neovascularization diagnosed with power Doppler ultrasonography (US) in Achilles tendons in patients with chronic achillodynia. MATERIALS AND METHODS:Forty consecutive patients (mean age, 52 years; age range, 30-72 years) were examined. US was performed bilaterally and rep...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2272012069
更新日期:2003-05-01 00:00:00