Abstract:
:A technique is described that permits the 19F nuclear magnetic resonance (NMR) imaging of the vascular system in animals that have been infused with certain perfluorocarbon blood substitutes. The essence of the technique is the selection for imaging of a narrow group of spectral lines from the fluorocarbon using a combination of selective excitation and selective spin echo. For perfluorotributylamine (FTBA), this uses 56% of the available fluorine signal. Both slice and whole body projection images were obtained. The method was studied on an experimental NMR imaging system based on a 1.4 T, 31 cm diameter magnet. Phantom tests showed that misregistration artifacts, due to the imaging of unwanted spectral lines, were negligible. The spatial resolution obtained in a scan time of 8.5 min was approximately 1 mm. The technique was tested with living rats in which 50% of the blood volume was replaced with an emulsion of FTBA. Short echo times, less than 15 ms, were essential to avoid losing signal from flow effects in the larger vessels. Structures identified included the heart, liver, spleen, lungs, kidneys, and major veins. A diffuse fluorine signal seen in most tissues is indicative of tissue perfusion. The problems and possibilities of potential clinical applications are discussed.
journal_name
J Comput Assist Tomogrjournal_title
Journal of computer assisted tomographyauthors
Joseph PM,Fishman JE,Mukherji B,Sloviter HAdoi
10.1097/00004728-198511000-00003subject
Has Abstractpub_date
1985-11-01 00:00:00pages
1012-9issue
6eissn
0363-8715issn
1532-3145journal_volume
9pub_type
杂志文章abstract::Seven patients with supratentorial infarction were studied by means of serial nuclear magnetic resonance imaging using saturation recovery (SR) and proton density (PD) sequences. The earliest changes were visible in the more sensitive T1 dependent images (SR) and may reflect the cytotoxic component of ischemic brain e...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1983-08-01 00:00:00
abstract::Seven patients with polypoid mucoceles of the ethmoid sinuses were examined by computed tomography (CT). The findings in all cases were remarkably similar. This unique CT appearance has not been seen with malignancies and should be considered characteristic of this benign entity. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198208000-00010
更新日期:1982-08-01 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::Present popular computed tomography (CT) algorithms reconstruct an object from the ray measurements lying on a set of parallel planes. This paper presents an algorithm that can also utilize "cross-plane" rays (i.e., rays that cross through many planes) to reconstruct the object. In this reconstruction algorithm, the r...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-197906000-00015
更新日期:1979-06-01 00:00:00
abstract::Although computed tomography (CT) delineation of normal white matter of the cerebral hemispheres has been well documented, there has been no description of white matter within the cerebellum. Through the use of phantom studies, CT number correlations between cerebellum and cerebral hemispheres, and anatomic correlatio...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-197804000-00005
更新日期:1978-04-01 00:00:00
abstract::A psoas mass in a patient with a history of penetrating trauma to the area was demonstrated by computed tomography (CT) to represent a lumbar artery pseudoaneurysm surrounded by hematoma. This report emphasizes the importance of recognizing the anatomic position of the lumbar arteries on CT images and considering the ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198406000-00044
更新日期:1984-06-01 00:00:00
abstract:PURPOSE:Electron beam CT (EBCT)-derived coronary artery calcium scores correlate with the extent of atherosclerosis, but there is a substantial variance about the general relationship between coronary calcification and coronary atherosclerosis. The relationship between calcification and atherosclerosis may also differ ...
journal_title:Journal of computer assisted tomography
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004728-199803000-00008
更新日期:1998-03-01 00:00:00
abstract::Our purpose was to increase the knowledge about subcortical low-intensity images on long repetition time by describing brain magnetic resonance images of a young boy after his first spontaneous seizure. Evident in the epileptogenic area were transient images of reversible subcortical low intensity on long-repetition t...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e31821f5d14
更新日期:2011-07-01 00:00:00
abstract::Fibrodysplasia ossificans progressiva is a rare disorder characterized by progressive heterotopic bone formation in connective tissue and muscle in association with congenital skeletal anomalies. The disease usually leads to extensive immobility and eventual disability. We report the magnetic resonance findings in a b...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199003000-00035
更新日期:1990-03-01 00:00:00
abstract:BACKGROUND:Increasing image pitch in computed tomographic (CT) imaging is a method through which scan time can be reduced, which can reduce motion artifacts. In this study, we assess the clinical feasibility of ultrahigh-pitch CT imaging made possible by dual-source CT. METHODS:Image pitch, total scan time, and image ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e31821a02c8
更新日期:2011-05-01 00:00:00
abstract::We report an unusual case of diffuse infiltration of the mesentery by amyloidosis. The CT, sonographic, and operative findings mimicked abdominal carcinomatosis. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::Ovarian fibromatosis is a rare benign nonneoplastic condition with ovarian enlargement in young women and characterized by a proliferation of collagen-producing spindle cells surrounding normal ovarian structures. We reported magnetic resonance findings of a case that the affected ovarian parenchyma with follicles was...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e318157689a
更新日期:2008-09-01 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::Proper therapeutic management of acute spinal trauma depends considerably on the assessment of the condition of the underlying spinal cord and the relative stability of the surrounding bony architecture. A series of 14 patients who were examined by magnetic resonance (MR) imaging following spinal trauma is presented. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198705000-00008
更新日期:1987-05-01 00:00:00
abstract::Neurofibromatosis or von Recklinghausen disease usually is a readily diagnosed entity, characterized by typical cutaneous lesions and a strong family history. In a variant of the usual disease, peripheral neurofibromatosis, these stigmata may be absent and accurate diagnosis may be elusive. We present a patient withou...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198304000-00039
更新日期:1983-04-01 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::Recurrent respiratory papillomatosis is a chronic disease of children and young adults associated with various complications, one of which is malignant change. We report CT findings of malignant change in a case of recurrent respiratory papillomatosis. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199509000-00020
更新日期:1995-09-01 00:00:00
abstract::Five cases of histologically confirmed olfactory neuroblastoma (esthesioneuroblastomas) have been studied by computed tomography (CT). Both the clinical symptoms (in particular, unilateral nasal obstruction and recurring epistaxis) and radiological findings (opacity of the paranasal sinuses) are nonspecific. Computed ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1978-09-01 00:00:00
abstract::MR imaging is useful in differentiating and characterizing renal masses. A careful evaluation of the signal characteristics and morphology of a renal mass combined with the ancillary imaging findings and patient history should assist the radiologist in making the proper diagnosis or recommending the appropriate treatm...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,评审
doi:10.1097/01.rct.0000135278.89314.60
更新日期:2004-09-01 00:00:00
abstract::We describe the effect of the off-center position, the bowtie filter type, and the direction of scan projection radiograph on the radiation dose and image noise of 64-detector computed tomographic scans using the automatic tube current modulation technique. On anteroposterior scan projection radiographs, the tube curr...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e31819d6f6f
更新日期:2009-11-01 00:00:00
abstract::Pancreas transplantation has become more commonplace over the past several decades. Consequently, the radiological evaluation of patients with such transplants has also become more common. Radiologists must therefore be familiar with the normal imaging appearances of pancreas transplant grafts as well as a wide variet...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,评审
doi:10.1097/RCT.0b013e3181966988
更新日期:2009-07-01 00:00:00
abstract::Subchondral fractures in association with an intact joint space and narrowing of the joint space have not previously been reported with sacroiliac joint trauma in children. The subchondral fractures are thought to occur through the zones of cartilage proliferation and provisional calcification in the growing cartilage...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198503000-00023
更新日期:1985-03-01 00:00:00
abstract:PURPOSE:To assess radiation dose reduction and image quality for weight-based chest computed tomographic (CT) examination results reconstructed using adaptive statistical iterative reconstruction (ASIR) technique. MATERIALS AND METHODS:With local ethical committee approval, weight-adjusted chest CT examinations were p...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3181b26c67
更新日期:2010-01-01 00:00:00
abstract:PURPOSE:Our goal was to assess the effect of image acquisition rate on the diagnostic efficacy of contrast-enhanced MRI in the conservatively treated breast. METHOD:Sixty-seven women, treated with breast-conserving surgery and radiotherapy for early-stage breast cancer, were imaged at 1.5 T using a dynamic contrast-en...
journal_title:Journal of computer assisted tomography
pub_type: 临床试验,杂志文章
doi:10.1097/00004728-199801000-00008
更新日期:1998-01-01 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:OBJECTIVE:We compared body coil (BC) MR images and endorectal surface coil (ERC) images with respect to the visualization of the cervix and adjacent tissues and the histopathologic correlations of the imaging findings. MATERIALS AND METHODS:Twenty-one patients with cervical carcinoma underwent MRI using both coils for...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1994-09-01 00:00:00
abstract::Computed tomography has had an increasing role in the evaluation of patients after blunt trauma. Important findings in thoracic trauma include acute traumatic aortic injury, pneumothorax, hemothorax, pulmonary contusions and lacerations, mediastinal hematoma, and diaphragmatic rupture. The solid abdominal viscera may ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,评审
doi:10.1097/01.rct.0000120858.80935.59
更新日期:2004-07-01 00:00:00
abstract:PURPOSE:To investigate the apparent diffusion coefficients (ADCs) of the normal uterine zonal structures (myometrium, endometrium, and junctional zone) during different phases of the menstrual cycle among premenopausal women with different age groups. MATERIALS AND METHODS:Magnetic resonance (MR) images of 67 healthy ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3182418885
更新日期:2012-01-01 00:00:00
abstract::Pulmonary vein stenosis is one of the frequent complications after radiofrequency ablation for atrial fibrillation. MRI plays an important role in depicting the pathoanatomic structure of the pulmonary veins, and measuring the blood flow velocity in the pulmonary veins before and after therapy, and is superior to tran...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200101000-00006
更新日期:2001-01-01 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