Optimization of electrostatic imaging systems for minimum patient dose or minimum exposure in mammography.

abstract：PURPOSE:Magnetic resonance (MR) images were correlated with results of fine-needle aspiration (FNA) to determine the role of MR imaging in evaluating hepatic neoplasms treated with percutaneous ethanol ablation therapy (PEAT). MATERIALS AND METHODS:Contrast material-enhanced and unenhanced MR images were obtained in 1...

journal_title：Radiology

authors： Nagel HS,Bernardino ME

更新日期：1993-10-01 00:00:00

abstract：PURPOSE:To evaluate the effects of alterations in the volume of contrast material on liver enhancement. MATERIALS AND METHODS:Thirty patients underwent repeat computed tomographic (CT) examinations within 6 months, the first with either 100, 150, or 180 mL of nonionic contrast material (2 mL/sec). In the second, only ...

journal_title：Radiology

authors： Chambers TP,Baron RL,Lush RM

更新日期：1994-11-01 00:00:00

abstract：PURPOSE:To prospectively develop and evaluate the accuracy of a duplex Doppler ultrasonographic (US) index for predicting the presence or absence of esophageal varices in patients with compensated cirrhosis (Child-Pugh class A) by using endoscopy as the reference standard. MATERIALS AND METHODS:The study had instituti...

journal_title：Radiology

authors： Liu CH,Hsu SJ,Liang CC,Tsai FC,Lin JW,Liu CJ,Yang PM,Lai MY,Chen PJ,Chen JH,Kao JH,Chen DS

更新日期：2008-07-01 00:00:00

abstract：:A variation in ossification of the acromial process of the scapula is described. Postmortem radiographs, obtained in 78 infants who died of sudden infant death syndrome, showed an ossific opacity adjacent to the acromial process in 10 infants (13%). This finding was noted bilaterally in six patients and unilaterally i...

journal_title：Radiology

authors： Kleinman PK,Spevak MR

更新日期：1991-07-01 00:00:00

abstract：:Continuous wave (CW) and pulsed Doppler ultrasound studies with spectral analysis were used to detect the left coronary arterial blood flow in patients who were undergoing routine echocardiography. The pulmonary artery is a stable ultrasonic landmark from which detection of the blood flow can be effected. The left cor...

journal_title：Radiology

authors： Gramiak R,Holen J,Moss AJ,Gutierrez OH,Picone AL,Roe SA

更新日期：1986-06-01 00:00:00

abstract：PURPOSE:To evaluate differences in T2 values in femoral and tibial cartilage at magnetic resonance (MR) imaging in patients with varying degrees of osteoarthritis (OA) compared with healthy subjects and to develop a mapping and display method based on calculation of T2 z scores for visual grading and assessment of cart...

journal_title：Radiology

authors： Dunn TC,Lu Y,Jin H,Ries MD,Majumdar S

更新日期：2004-08-01 00:00:00

abstract：PURPOSE:To determine if vertebral bone densities or vertebral body sizes contribute to gender differences in vertebral bone mass in adults. MATERIALS AND METHODS:Cancellous and cortical bone densities and dimensions of three lumbar vertebrae in 25 women and 18 men were measured with quantitative computed tomography (C...

journal_title：Radiology

authors： Gilsanz V,Boechat MI,Gilsanz R,Loro ML,Roe TF,Goodman WG

更新日期：1994-03-01 00:00:00

abstract：PURPOSE:To investigate the feasibility of breast tissue characterization in terms of water, lipid, and protein contents with a spectral computed tomographic (CT) system based on a cadmium zinc telluride (CZT) photon-counting detector by using postmortem breasts. MATERIALS AND METHODS:Nineteen pairs of postmortem breas...

journal_title：Radiology

authors： Ding H,Klopfer MJ,Ducote JL,Masaki F,Molloi S

更新日期：2014-09-01 00:00:00

abstract：:Seventeen bilateral upper extremity lymphangiograms were obtained in patients with lymphoma referred for radiation therapy. The projection of the opacified axillary nodes is analyzed when using the mantle technique in various positions. The position of the lymph nodes varies considerably in the supine and prone positi...

journal_title：Radiology

authors： Weisenburger TH,Juillard GJ

更新日期：1977-01-01 00:00:00

abstract：:Large, multiloculated abscesses can be difficult to drain percutaneously. The authors describe a technique for disrupting septations within an abscess cavity to provide more complete and effective drainage. It has been successfully performed in four patients. ...

journal_title：Radiology

authors： Lieberman RP,Hahn FJ,Imray TJ,Phalen JT

更新日期：1986-12-01 00:00:00

abstract：:The dynamics of white blood cell (WBC) and 67Ga-citrate accumulation were studied in rabbits with subcutaneous polyethylene chambers. Uninfected chamber fluid (CF) contained less than 1,000 WBCs/mm3, most of which were mononuclear. After 67Ga injection, radioactivity increased slowly in uninfected fluid, peaked betwee...

journal_title：Radiology

authors： Tight RR,Siddiqui AR

更新日期：1981-07-01 00:00:00

abstract：:The results of percutaneous drainage of abdominal abscesses in 136 patients are analyzed, revealing a failure rate of 23% (31 patients). The mortality rate was 1.4% (two patients); the rate of serious complications was 5% (seven patients). Failure rate was lowest in critically ill patients having palliative drainage o...

journal_title：Radiology

authors： Lang EK,Springer RM,Glorioso LW 3rd,Cammarata CA

更新日期：1986-05-01 00:00:00

abstract：PURPOSE:To describe imaging features of tuberculous tenosynovitis and bursitis with various imaging methods. MATERIALS AND METHODS:Twenty-one patients with surgically and/or pathologically proved tuberculosis of the tendon sheaths or bursae were evaluated. Routine radiography, arthrography, computed tomography (CT), a...

journal_title：Radiology

authors： Jaovisidha S,Chen C,Ryu KN,Siriwongpairat P,Pekanan P,Sartoris DJ,Resnick D

更新日期：1996-11-01 00:00:00

abstract：:Purpose To determine whether gadolinium deposits in neural tissues of patients with intracranial abnormalities following intravenous gadolinium-based contrast agent (GBCA) exposure might be related to blood-brain barrier integrity by studying adult patients with normal brain pathologic characteristics. Materials and M...

journal_title：Radiology

authors： McDonald RJ,McDonald JS,Kallmes DF,Jentoft ME,Paolini MA,Murray DL,Williamson EE,Eckel LJ

更新日期：2017-11-01 00:00:00

abstract：:A high-resolution real-time ultrasound sector scanner was used in the evaluation of patients with suspected gallbladder disease. This technique is noninvasive, requires minimal preparation, and takes less than five minutes for a thorough examination of the gallbladder and related anatomy. In 17 months, 959 patients we...

journal_title：Radiology

authors： Cooperberg PL,Pon MS,Wong P,Stoller JL,Burhenne HJ

更新日期：1979-06-01 00:00:00

abstract：:In 2 adults who had received thorotrast intravenously at ages 2 and 3 years, respectively, radiopaque outlines of their infantile vertebrae were seen in the adult vertebrae. Similar "ghosts" of the hemipelves were present in the pelvis of 1 patient. Autopsy findings and autoradiographs in 1 patient strongly suggest th...

journal_title：Radiology

authors： Teplick JG,Head GL,Kricun ME,Haskin ME

更新日期：1978-12-01 00:00:00

abstract：PURPOSE:To design a chest radiography unit that eliminates scatter. MATERIALS AND METHODS:A scanning slit radiography unit that also incorporates a conventional grid was designed. The scanning slit geometry defined a 10-mm-wide beam at the image receptor. RESULTS:With a typical heavy-duty radiographic tube, the propo...

journal_title：Radiology

authors： Barnes GT,Wu X,Sanders PC

更新日期：1994-02-01 00:00:00

abstract：PURPOSE:To evaluate endorectal coil magnetic resonance (MR) imaging in the depiction of local recurrence after radical prostatectomy. MATERIALS AND METHODS:Endorectal MR images were reviewed retrospectively in 82 patients who underwent prostatectomy. The interval between prostatectomy and MR imaging ranged between 0.5...

journal_title：Radiology

authors： Sella T,Schwartz LH,Swindle PW,Onyebuchi CN,Scardino PT,Scher HI,Hricak H

更新日期：2004-05-01 00:00:00

abstract：:We performed 32 overpressure radionuclide cisternography (ORNC) studies to examine 26 patients who were clinically suspected of having cerebrospinal fluid (CSF) fistula with rhinorrhea. Fifteen (47%) of these cisternography studies were positive, and the site of the leak was identified. No leak could be demonstrated i...

journal_title：Radiology

authors： Curnes JT,Vincent LM,Kowalsky RJ,McCartney WH,Staab EV

更新日期：1985-03-01 00:00:00

abstract：PURPOSE:To compare the computed tomographic (CT) findings of tuberculosis and Mycobacterium avium-intracellulare (MAI) infection in immunocompetent patients. MATERIALS AND METHODS:Seventy-seven consecutive immunocompetent patients with culture-proved pulmonary mycobacterial infection (45 with pulmonary tuberculosis, 3...

journal_title：Radiology

authors： Primack SL,Logan PM,Hartman TE,Lee KS,Müller NL

更新日期：1995-02-01 00:00:00

abstract：PURPOSE:To retrospectively determine the incidence of nephrogenic systemic fibrosis (NSF) in a large academic medical center after the adoption of restrictive gadolinium-based contrast agent (GBCA) administration guidelines. MATERIALS AND METHODS:For this retrospective HIPAA-compliant study, institutional review board...

journal_title：Radiology

authors： Wang Y,Alkasab TK,Narin O,Nazarian RM,Kaewlai R,Kay J,Abujudeh HH

更新日期：2011-07-01 00:00:00

abstract：:Three cases of esophagitis caused by oral medication are reported: 2 were the result of prolonged use of quinidine tablets (producing focal subacute inflammation mimicking carcinoma in one and stricture in the other) and one occurred soon after ingestion of liquid KCl. Previous reports have implicated KCl tablets ("sl...

journal_title：Radiology

authors： Teplick JG,Teplick SK,Ominsky SH,Haskin ME

更新日期：1980-01-01 00:00:00

abstract：:The pressures generated by a barium suspension and various solutions of meglumine sodium diatrizoate in water were measured with a manometer. A pressure of 120 mm Hg was produced by a 3.5-foot (105-cm) column of 60% wt/vol barium and a 5-foot (150-cm) column of either a 1:3 or 1:4 solution of meglumine sodium diatrizo...

journal_title：Radiology

authors： Kuta AJ,Benator RM

更新日期：1990-04-01 00:00:00

abstract：:Distal splenorenal shunts were made in 25 patients with cirrhosis of the liver and portal hypertension. Angiograms were obtained in 16 patients at one week, three and six months, and at one year postoperatively. Portal vein flow had diminished in all patients compared with flow seen in preoperative angiograms. Hepatof...

journal_title：Radiology

authors： Tylén U,Simert G,Vang J

更新日期：1976-12-01 00:00:00

abstract：:Emission computed tomography (ECT) studies were performed on test objects and dogs. Conjugate views were obtained for 60 to 120 projections equispaced around 360 degrees by rotation of the subjects in front of a gamma camera. A convolution reconstruction algorithm in which gamma ray attenuation corrections are include...

journal_title：Radiology

authors： Gustafson DE,Berggren MJ,Singh M,Dewanjee MK

更新日期：1978-10-01 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

authors： Baek HM,Chen JH,Nie K,Yu HJ,Bahri S,Mehta RS,Nalcioglu O,Su MY

更新日期：2009-06-01 00:00:00

abstract：PURPOSE:To evaluate the relationship among chest radiographs, oxygen supplementation requirement, and treatment response in severe acute respiratory syndrome (SARS). MATERIALS AND METHODS:Forty patients (20 women, 20 men; mean age, 42.90 years +/- 14.01 [SD]; median age, 41.5 years; age range, 25-82 years) with SARS w...

journal_title：Radiology

authors： Ooi CG,Khong PL,Ho JC,Lam B,Wong WM,Yiu WC,Wong PC,Wong CF,Lai KN,Tsang KW

更新日期：2003-11-01 00:00:00

abstract：:Purpose To determine the effect of radiation dose and iterative reconstruction (IR) on noise, contrast, resolution, and observer-based detectability of subtle hypoattenuating liver lesions and to estimate the dose reduction potential of the IR algorithm in question. Materials and Methods This prospective, single-cente...

journal_title：Radiology

authors： Solomon J,Marin D,Roy Choudhury K,Patel B,Samei E

更新日期：2017-09-01 00:00:00

abstract：:History A 3-month-old previously healthy girl presented to an outside institution with a 4-day history of low-grade fever, irritability, and a tender "knot" in the upper abdomen. Ultrasonography (US) was performed at an outside hospital. US images were not available for review; however, they showed a mass in the left ...

journal_title：Radiology

authors： Sandberg JK,Hulett-Bowling R,Khanna G

更新日期：2018-05-01 00:00:00

abstract：:Localized phosphorus-31 magnetic resonance (MR) spectroscopy in humans has previously been accomplished with surface coils by means of depth-resolved surface coil spectroscopy or rotating frame experiments, in which the extent of tissue sampled critically depends on surface coil placement. The authors' goal was to mod...

journal_title：Radiology

authors： Matson GB,Twieg DB,Karczmar GS,Lawry TJ,Gober JR,Valenza M,Boska MD,Weiner MW

更新日期：1988-11-01 00:00:00