Abstract:
:A method by which the tissue parameters - T1, T2, and proton density - can be measured simultaneously was used in 160 patients with brain tumors to test the complete potential of magnetic resonance (MR) imaging for quantitative tissue characterization. MR tissue parameters of a wide variety of tumors, edema, white matter, and gray matter were determined. While normal brain tissues showed only small interindividual variations of tissue parameters, pathologic entities (tumor, edema) were characterized by wide ranges of T1, T2, and proton density values. The considerable overlapping of tissue parameters in different tumor entities, which were analyzed in a three-dimensional T1/T2/proton density space, indicates that a reliable diagnosis cannot be made on the basis of a quantitative evaluation of T1, T2, and proton density alone.
journal_name
Radiologyjournal_title
Radiologyauthors
Just M,Thelen Mdoi
10.1148/radiology.169.3.3187000subject
Has Abstractpub_date
1988-12-01 00:00:00pages
779-85issue
3eissn
0033-8419issn
1527-1315journal_volume
169pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract:PURPOSE:To evaluate the accuracy of ultrasonography (US) in determining the anatomic variations in the first extensor compartment of the wrist. MATERIALS AND METHODS:Approval from the anatomic donations department was obtained. The first extensor compartment of the wrist of 40 nonembalmed cadaveric forearms (15 male a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10092265
更新日期:2010-11-01 00:00:00
abstract::History A 55-year-old woman presented to our breast clinic with 1-year history of lancinating pain in the right breast that was exacerbated by blunt pressure and cold temperature. She denied any family history of breast cancer or any personal history of trauma, infection, or surgery of the breast. On clinical examinat...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.13120919
更新日期:2014-01-01 00:00:00
abstract::Balloon dilation is a well-described, nonoperative, alternative treatment for postoperative strictures of the colon and rectum. This procedure may not be technically feasible when an occluded lumen prevents passage of a guide wire across the obstruction. The authors describe the use of transrectal ultrasound guidance ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.189.2.8210400
更新日期:1993-11-01 00:00:00
abstract::Three significantly different lateral approaches to the cervical subarachnoid space (anterior, midplane, and posterior needle positions) have been previously described for cordotomy and myelography. Experimental lateral C1-2 punctures were performed by each of these three methods in anatomic specimens, cadaver models ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.146.2.6687370
更新日期:1983-02-01 00:00:00
abstract:PURPOSE:To determine, in a dual-center setting, whether patients who experience transient severe motion ( TSM transient severe motion ) in the arterial phase during gadoxetate disodium-enhanced magnetic resonance (MR) imaging are at higher risk for a subsequent episode of TSM transient severe motion than patients who d...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14140386
更新日期:2015-01-01 00:00:00
abstract:PURPOSE:To evaluate the prevalence of testicular microlithiasis (TM) in children who have undergone scrotal ultrasonography (US) and their association with testicular tumors. MATERIALS AND METHODS:This HIPAA-compliant study with waiver of informed consent was approved by the institutional review board. From 2003 to 20...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.13130394
更新日期:2014-03-01 00:00:00
abstract::A review of the records of 23 patients with squamous cell carcinoma of the oral tongue and floor of mouth treated with irradiation after excisional biopsy has shown that: (a) Radiotherapy, primarily using interstitial radium implants, results in excellent local control of the primary area (100%) with preservation of f...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/116.1.143
更新日期:1975-07-01 00:00:00
abstract:PURPOSE:To determine if fluorine 18 fluorodeoxyglucose (FDG) positron emission tomographic (PET)/computed tomographic (CT) imaging can depict a treatment effect from intravenous antibiotics for pulmonary exacerbation in cystic fibrosis (CF). MATERIALS AND METHODS:The study was approved by the institutional review boar...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12111873
更新日期:2012-09-01 00:00:00
abstract::Extracranial duplication of the vertebral artery was demonstrated angiographically on both sides in a patient with postmeningitis hydrocephalus and in another with hemangioblastoma. Forty-six cases of this anomaly are reviewed. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/131.2.408
更新日期:1979-05-01 00:00:00
abstract:PURPOSE:To examine the feasibility and safety of magnetic resonance (MR)-guided biopsy by using a transgluteal approach in patients with suspicious prostate lesions by using an MR-compatible robotic system and a 1.5-T MR system. MATERIALS AND METHODS:The study was approved by the institutional review board of Universi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.11101559
更新日期:2011-06-01 00:00:00
abstract::Renal allograft recipients were routinely monitored by means of duplex Doppler ultrasound. In a 20-month survey period, four instances of acute renal vein thrombosis were detected among 75 patients. All episodes occurred within the first 3 postoperative days. The examinations disclosed peaked, abruptly dropping systol...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.170.2.2643150
更新日期:1989-02-01 00:00:00
abstract::The extraperitoneal space around the urinary bladder is lamellate, just like the retroperitoneal space around the kidneys. The bladder, urachus, and obliterated umbilical arteries lie within the perivesical space, surrounded by umbilicovesical fascia, analogous to the perinephric space within the renal fascia. A much ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.159.2.2938210
更新日期:1986-05-01 00:00:00
abstract:PURPOSE:To evaluate the effect of the increase in total cross-sectional area of arteries as they branch beyond the main trunks on the resistive index (RI) and early systolic acceleration (ESA). MATERIALS AND METHODS:An essentially noncompliant in vitro model that used a pulsatile pump, blood-mimicking fluid, and a bra...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.212.3.r99se13732
更新日期:1999-09-01 00:00:00
abstract::To determine the prevalence of "nonobstructive" (impairment of gas transfer) emphysema in a select population of smokers with dyspnea, a retrospective study of patients with emphysema evident at high-resolution computed tomography (HRCT) was undertaken. Four hundred seventy HRCT studies were reviewed. In 47 cases, cen...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.182.3.1535900
更新日期:1992-03-01 00:00:00
abstract::The sonograms of 34 patients with surgically proved pelvic hemoperitoneum were reviewed. In 15 of these patients clotted blood was found at surgery in the pelvis or cul-de-sac. In nine of these patients (60%), ultrasound demonstrated echogenic fluid collections or "masses" with an echogenicity equal to or greater than...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.145.1.7122870
更新日期:1982-10-01 00:00:00
abstract:PURPOSE:To evaluate involvement of the lower uterine segment (LUS) in adenocarcinoma of the endometrium and to identify patterns of treatment failure. MATERIALS AND METHODS:Two hundred four patients, aged 29-92 years, with endometrial carcinoma underwent surgery. Postoperative radiation therapy was administered for ad...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.196.2.7617840
更新日期:1995-08-01 00:00:00
abstract::Purpose To characterize intratumoral spatial heterogeneity at perfusion magnetic resonance (MR) imaging and investigate intratumoral heterogeneity as a predictor of recurrence-free survival (RFS) in breast cancer. Materials and Methods In this retrospective study, a discovery cohort (n = 60) and a multicenter validati...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiol.2018172462
更新日期:2018-07-01 00:00:00
abstract::The contrast, resolution, geometric, and motion unsharpness, mottle, and overall impression of 105mm film were compared to these quantities in conventional spot film. It is believed that conventional filming is superior for low contrast objects and cooperative patients whereas with uncooperative, obese patients, the 1...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/118.2.433
更新日期:1976-02-01 00:00:00
abstract::Otosclerosis (otospongiosis) is a primary focal disease of the labyrinthine capsule. The stapes footplate is fixed when the spongiotic focus expands and invades the oval window. Persons with stapedial otosclerosis experience a progressive conductive hearing loss. In many cases, cochlear degeneration is observed, in wh...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.156.3.4023230
更新日期:1985-09-01 00:00:00
abstract:PURPOSE:To examine relationships between brain white matter hyperintensities depicted at magnetic resonance (MR) imaging and performance on neuropsychologic tests in community-dwelling elderly adults. MATERIALS AND METHODS:The 1921 Aberdeen Birth Cohort is a subsample of survivors of the Scottish Mental Survey of 1932...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2211010086
更新日期:2001-10-01 00:00:00
abstract::Kinetics of an iodinated contrast medium were evaluated quantitatively as a function of time up to one hour after intravenous infusion in the brains of dogs with experimentally induced radiation damage and dogs with spontaneous brain tumor. Radiation damage was characterized by an increase in iodine accumulation soon ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.151.1.6701300
更新日期:1984-04-01 00:00:00
abstract::Human polyclonal immunoglobulin (Ig) G was attached to a monocrystalline iron oxide nanocompound (MION), a small superparamagnetic probe developed for receptor and antibody magnetic resonance (MR) imaging. The resulting complex, MION-IgG, had a slightly negative surface charge, a molecular weight of 150-180 kDa, and 0...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.181.1.1887040
更新日期:1991-10-01 00:00:00
abstract::Perfusion computed tomography (CT) is a relatively new technique that allows rapid qualitative and quantitative evaluation of cerebral perfusion by generating maps of cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT). The technique is based on the central volume principle (CBF = CBV/M...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2313021488
更新日期:2004-06-01 00:00:00
abstract:PURPOSE:To prospectively compare contrast material-enhanced (CE) magnetic resonance (MR) imaging-derived right-to-left ventricle pulmonary transit time (PTT), left ventricular (LV) full width at half maximum (FWHM), and LV time to peak (TTP) between patients with pulmonary arterial hypertension (PAH) and healthy volunt...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12111001
更新日期:2012-06-01 00:00:00
abstract::Exfoliative cytology of bile aspirated from percutaneously placed combined external/internal biliary drainage catheters yielded positive results in 34% of 100 cases. There were no false-positive results. Bile cytology is a simple, inexpensive, and useful method which can establish a diagnosis of malignant biliary obst...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.149.3.6647860
更新日期:1983-12-01 00:00:00
abstract::Background The hardware and software differences between MR vendors and individual sites influence the quantification of MR spectroscopy data. An analysis of a large data set may help to better understand sources of the total variance in quantified metabolite levels. Purpose To compare multisite quantitative brain MR ...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiol.2020191037
更新日期:2020-04-01 00:00:00
abstract::A comprehensive magnetic resonance (MR) imaging protocol for assessment of coronary artery disease (CAD) is presented. The protocol includes multiphase gradient-echo cine MR imaging for assessment of cardiac function, first-pass myocardial perfusion imaging at rest and during adenosine stress, MR imaging with delayed ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2243011436
更新日期:2002-10-01 00:00:00
abstract:PURPOSE:To describe the imaging findings in patients with autoimmune lymphoproliferative syndrome (ALPS) and to relate the findings to the clinical and genetic features of this recently recognized syndrome. MATERIALS AND METHODS:Retrospective or prospective reviews of the computed tomographic (CT) and ultrasonographic...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.212.1.r99jl40257
更新日期:1999-07-01 00:00:00
abstract:PURPOSE:To compare the magnetic resonance (MR) imaging findings of primary hepatocellular carcinoma (HCC) in cirrhotic versus noncirrhotic livers. MATERIALS AND METHODS:MR images in 36 patients with HCC (30 men and she women aged 42-84 years [mean age, 65 years]) were retrospectively reviewed. The number and size of h...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.210.1.r99ja1975
更新日期:1999-01-01 00:00:00
abstract::In situ saphenous vein grafts are being used with increasing frequency for bypass procedures involving the femoral and popliteal arteries. Complications of these procedures include anastomotic stenoses and persistent arteriovenous fistulae that may result in failure of the graft. Balloon angioplasty and embolotherapy ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.160.3.3737910
更新日期:1986-09-01 00:00:00