Abstract:
PURPOSE:To determine the natural time course of development of hyperacute thermal lesions in the brain. MATERIALS AND METHODS:Ten interstitial lesions were created in five rabbit brains with a radio-frequency probe; an electrode-tip temperature of 80 degrees C was maintained for 60 seconds. Continuous fast spin-echo magnetic resonance (MR) imaging was used to follow lesion development for a minimum of 30 minutes. Temporal variations in lesion size and signal intensity were examined. Findings in final images were correlated with histologic findings. RESULTS:Images demonstrated a focal hyperintense zone, which developed into an expanding ring of edema surrounding a necrotic center in about 10 minutes. Quantitative analysis revealed a 23% +/- 6 (standard deviation) increase in average signal intensity of the edema layer and a 152% +/- 41 increase in overall lesion size. CONCLUSION:Full development of a thermal lesion is delayed for a period of minutes. Clinical implications of this effect should be considered when MR imaging-guided thermal ablation is performed.
journal_name
Radiologyjournal_title
Radiologyauthors
Farahani K,Mischel PS,Black KL,De Salles AA,Anzai Y,Lufkin RBdoi
10.1148/radiology.196.2.7617870subject
Has Abstractpub_date
1995-08-01 00:00:00pages
517-20issue
2eissn
0033-8419issn
1527-1315journal_volume
196pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract:PURPOSE:To determine the feasibility of measuring choline and glycogen concentrations in normal human liver in vivo with proton (hydrogen 1 [1H]) magnetic resonance (MR) spectroscopy. MATERIALS AND METHODS:Signed consent to participate in an institutional review board-approved and HIPAA-compliant study was obtained fr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12112344
更新日期:2012-11-01 00:00:00
abstract:PURPOSE:To determine the accuracy of helical computed tomography (CT) without the oral, intravenous, or rectal administration of contrast material in confirming suspected acute appendicitis. MATERIALS AND METHODS:Three hundred consecutive patients referred from the departments of surgery and emergency medicine were ex...
journal_title:Radiology
pub_type: 临床试验,杂志文章
doi:10.1148/radiology.213.2.r99nv44341
更新日期:1999-11-01 00:00:00
abstract::The feasibility of using focused ultrasound for studying structures as small as biliary ducts and correlative radiological and ultrasonic studies of the common and larger hepatic ducts are presented. Patients whose bile ducts were visualized on intravenous or T-tube cholangiography or oral cholecystography underwent r...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/118.1.155
更新日期:1976-01-01 00:00:00
abstract::Percutaneous aspiration of the gallbladder was performed for nine hospitalized patients, most commonly to establish the diagnosis of acute cholecystitis and its complications in the critically ill patient or patient with sepsis. In five patients, aspiration alone was performed; in four, permanent percutaneous catheter...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.155.3.3890000
更新日期:1985-06-01 00:00:00
abstract:PURPOSE:To test a neural network in differentiation of benign from malignant solitary pulmonary nodules. MATERIALS AND METHODS:Neural networks were trained and tested on the characteristics of 318 nodules. Predictive accuracy of the network was judged for calibration and discrimination. Network results were compared w...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.196.3.7644650
更新日期:1995-09-01 00:00:00
abstract::A 40-year-old man with a history of tuberculosis developed massive hemoptysis. Embolization of a bronchial artery branch did not resolve the bleeding. Selective angiography eventually revealed three pseudoaneurysms arising from an apical segmental branch of the right pulmonary artery, two of which were successfully em...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.193.2.7972750
更新日期:1994-11-01 00:00:00
abstract::Normal pancreatic ultrasound studies of 28 patients were evaluated as to pancreatic echogenicity and correlated with the morphologic appearance of the pancreas on CT to test the hypothesis that increasing pancreatic echogenicity is related to greater fat infiltration. Statistical analysis indicates that fat is a major...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.137.2.7433680
更新日期:1980-11-01 00:00:00
abstract:PURPOSE:To prospectively assess quantitatively the inherent contrast of electromagnetic (EM) properties that can be imaged by using available technology in women with abnormal findings at conventional breast imaging who underwent subsequent biopsy. MATERIALS AND METHODS:The protocol was HIPAA compliant and approved by...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2432060286
更新日期:2007-05-01 00:00:00
abstract:PURPOSE:To investigate the effect of injection rate of contrast medium on aortic and hepatic peak enhancement at computed tomography. MATERIALS AND METHODS:Early pharmacokinetics of contrast enhancement was analyzed theoretically and simulated with a compartment model. Contrast enhancement curves were generated from t...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.206.2.9457200
更新日期:1998-02-01 00:00:00
abstract::Five cases, four histologically proved, or hamartoma of the tuber cinereum and hypothalamus in children (age range: 2--12 years) are reported. Three cases had pubertas praecox, and in all of these the hamartoma was located in the basal cistern between the chiasm and pons, and had a collar button shape and size typical...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/127.3.697
更新日期:1978-06-01 00:00:00
abstract::Leigh disease, or subacute necrotizing encephalomyelopathy (SNE), is a familial, degenerative disorder characterized by lesions of the gray and white matter in the brain and spinal cord. Low attenuation in the putamina on computed tomography (CT) scans is considered to be characteristic of the disease. The authors use...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.162.1.3786750
更新日期:1987-01-01 00:00:00
abstract::Computer-controlled graphic displays are a necessity in many nuclear medicine studies. The authors propose using a set-up consisting of three modules: (a) a display system based on television technology; (b) an instrument interface employing list mode and having a low information loss rate; and (c) flexible modular so...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/124.3.759
更新日期:1977-09-01 00:00:00
abstract::Background Modern high-spatial-resolution radiologic methods enable increasingly detailed volumetric postmortem investigations of human neuroanatomy for diagnostic, research, and educational purposes. Purpose To evaluate the viability of postmortem x-ray phase-contrast micro-CT to provide tissue-conserving, high-spati...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2020201622
更新日期:2021-01-01 00:00:00
abstract:PURPOSE:To evaluate a percutaneous pulmonary embolism (PE) thrombectomy catheter that aspirates, macerates, and removes thrombus. MATERIALS AND METHODS:Nine in vitro tests were performed by using porcine thrombi at a PE test station that provides continuous fluid output of 2 L/min at a pressure of 50 mmHg. Macroemboli...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2363041287
更新日期:2005-09-01 00:00:00
abstract:PURPOSE:To assess the relationship between imaging findings, therapy, and functional outcome in patients with persistent low back pain who are suspected of having herniated nucleus pulposus. MATERIALS AND METHODS:Data collected during a multicenter, longitudinal study were retrospectively analyzed (n = 1,084). Multiva...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiology.203.3.9169710
更新日期:1997-06-01 00:00:00
abstract:PURPOSE:To determine the effect of a false-positive mammogram that leads to open surgical biopsy on subsequent screening mammography behavior in women. MATERIALS AND METHODS:This study was performed with a retrospective cohort design, and data were collected by means of telephone interview. All participants were women...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.208.1.9646820
更新日期:1998-07-01 00:00:00
abstract::Twenty-two normal volunteers and 32 patients with either benign prostatic hypertrophy or prostatic carcinoma were examined by magnetic resonance imaging (MRI). The images were of high quality and clearly demonstrated the prostate gland and the surrounding anatomy but were of limited value in differentiating between be...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.154.1.2578070
更新日期:1985-01-01 00:00:00
abstract::To determine whether gadodiamide injection can provide sufficient enhancement on both T1- and T2-weighted spin-echo magnetic resonance (MR) images of the heart and skeletal muscles, anesthetized rats were divided into five groups. Groups 1-3 received 0.1 (n = 9), 0.3 (n = 8), or 0.5 (n = 8) mmol/kg gadodiamide injecti...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.186.1.8416560
更新日期:1993-01-01 00:00:00
abstract::Possible signs of paratracheal lymphadenopathy on the posteroanterior (PA) chest radiograph were assessed in 98 patients and correlated with computed tomography (CT). The nodes were normal in size in 62 patients and enlarged (greater than 15 mm) in 36. Among the latter group, widening of the right paratracheal stripe ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.156.3.4023240
更新日期:1985-09-01 00:00:00
abstract:PURPOSE:To identify opportunities for improving patient-centered communication about diagnostic imaging tests that involve the use of radiation in a cancer care setting. MATERIALS AND METHODS:Institutional review board approval and informed consent were obtained for this HIPAA-compliant study. Patient knowledge, infor...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.15132905
更新日期:2015-05-01 00:00:00
abstract:PURPOSE:To evaluate the degeneration of the ipsilateral substantia nigra after striatal infarction by using magnetic resonance (MR) imaging. MATERIALS AND METHODS:Twenty-five adult patients with embolic cerebral infarction of the middle cerebral artery distribution underwent MR imaging 0-4, 5-9, 12-15, and 27-29 days ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.204.3.9280270
更新日期:1997-09-01 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::On computed tomographic scans of the upper abdomen the interface sign can help distinguish pleural and intra-abdominal fluid readily and accurately. A hazy interface between the fluid and liver or spleen is characteristic of pleural fluid. A sharp interface is characteristic of ascites. The interface sign has proved t...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.144.2.7089290
更新日期:1982-07-01 00:00:00
abstract:PURPOSE:To validate the usefulness of a newly developed tracer for preoperative gastric sentinel lymph node (LN) (SLN) mapping and intraoperative navigation after a single preoperative submucosal injection in rat and beagle models. MATERIALS AND METHODS:This study was approved by the Experimental Animal Ethical Commit...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14141159
更新日期:2015-04-01 00:00:00
abstract:PURPOSE:To evaluate the additional diagnostic value of unenhanced computed tomographic (CT) images in the depiction of viable tumor in patients who were treated with transcatheter arterial chemoembolization (TACE) for hepatocellular carcinoma (HCC) and followed up with biphasic helical CT that included the acquisition ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2253011346
更新日期:2002-12-01 00:00:00
abstract:PURPOSE:To develop criteria to identify thresholds for minimally acceptable physician performance in interpreting screening mammography studies and to profile the impact that implementing these criteria may have on the practice of radiology in the United States. MATERIALS AND METHODS:In an institutional review board-a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10091636
更新日期:2010-05-01 00:00:00
abstract::The sonographic appearance in 4 cases of primary carcinoma of the gallbladder is correlated with the surgical and pathological findings. A fungating tumor had the greatest chance of resection, with findings dependent on the location and size of the mass. Infiltrating lesions were highly malignant. In less advanced cas...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.3.7355220
更新日期:1980-03-01 00:00:00
abstract:PURPOSE:To evaluate the incidence of postoperative complications in liver donors and the efficacy of interventional management for treating these complications. MATERIALS AND METHODS:The study included 386 consecutive donors: 219 donors underwent right lobectomy or segmentectomy and 167 donors underwent left lobectomy...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2302021318
更新日期:2004-02-01 00:00:00
abstract::Cranial magnetic resonance (MR) images were prospectively obtained in 74 human immunodeficiency virus (HIV)-seropositive subjects, all of whom had undergone MR imaging 24-42 months earlier. The images were interpreted by neuroradiologists blinded to the subject's clinical status and were compared with the initial MR i...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.188.3.8351340
更新日期:1993-09-01 00:00:00
abstract:PURPOSE:To investigate the utility of diffusion-weighted (DW) imaging in distinguishing bland thrombus from neoplastic thrombus in the portal vein in patients with hepatocellular carcinoma (HCC). MATERIALS AND METHODS:In this retrospective institutional review board-approved HIPAA-complaint study, the imaging results ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.09090304
更新日期:2010-01-01 00:00:00