Survey of reproductive health among female MR workers.


:Epidemiologic data were obtained to evaluate potential risks from exposure to the static and time-varying magnetic fields used in magnetic resonance (MR) imaging. A questionnaire sent to women workers in more than 90% of clinical MR facilities in the United States addressed menstrual-reproductive experiences, work activities, and potential confounders (eg, age, smoking, alcohol use). In 1,915 completed questionnaires, 1,421 pregnancies were reported: 280 occurred in an MR worker (technologist or nurse), 894 in an employee in another job, 54 in a student, and 193 in homemakers. Comparing MR-worker pregnancies with those occurring in employees at other jobs, a relative risk ratio of 1.27 (95% confidence interval [CI], 0.92-1.77) was found for spontaneous abortions; for conception taking more than 12 months, 0.90 (CI, 0.54-1.51); for delivery before 39 weeks, 1.19 (CI, 0.76-1.88); for birth weight below 5.5 lb (2.5 kg), 1.01 (CI, 0.50-2.04); and for male gender of the offspring, 0.99 (CI, 0.80-1.22). Adjustment for maternal age, smoking, and alcohol use also failed to markedly change any of the associations. These results suggest that there is not a substantial increase in these common adverse reproductive outcomes.






Kanal E,Gillen J,Evans JA,Savitz DA,Shellock FG




Has Abstract


1993-05-01 00:00:00












  • Cerebellopontine angle-petromastoid mass lesions: comparative study of diagnosis with MR imaging and CT.

    abstract::Capabilities of computed tomography (CT) and magnetic resonance (MR) imaging in the diagnosis of cerebellopontine angle-petromastoid (CPA-PM) lesions were compared in 75 patients. CT and MR demonstrated 95.8% and 98.7% of the lesions, respectively. MR was often more helpful for characterization of neuromas, epidermoid...


    pub_type: 杂志文章


    authors: Gentry LR,Jacoby CG,Turski PA,Houston LW,Strother CM,Sackett JF

    更新日期:1987-02-01 00:00:00

  • Nuclear magnetic resonance evaluation of stroke. A preliminary report.

    abstract::Nine patients who had acute and subacute stroke were examined by nuclear magnetic resonance (NMR) using a 6-MHz Bruker Instruments proton scanner. A modified Carr-Purcell-Meiboom-Gill pulse sequence was used for signal detection. The resultant string of spin-echoes was Fourier transformed into projections that were su...


    pub_type: 杂志文章


    authors: Bryan RN,Willcott MR,Schneiders NJ,Ford JJ,Derman HS

    更新日期:1983-10-01 00:00:00

  • Subarachnoid space disease: diagnosis with fluid-attenuated inversion-recovery MR imaging and comparison with gadolinium-enhanced spin-echo MR imaging--blinded reader study.

    abstract:PURPOSE:To evaluate fluid-attenuated inversion-recovery (FLAIR) magnetic resonance (MR) imaging in a blinded reader study for the detection of proved subarachnoid space (SAS) disease. MATERIALS AND METHODS:FLAIR MR imaging was performed in 62 patients (21 with proved SAS or meningeal disease) and 41 control patients. ...


    pub_type: 杂志文章


    authors: Singer MB,Atlas SW,Drayer BP

    更新日期:1998-08-01 00:00:00

  • Evaluation of focal defects on technetium-99m sulfur colloid scans with new hepatobiliary agents.

    abstract::In 3,600 patients evaluated with technetium-99m sulfur colloid for metastatic liver disease, 40 had equivocal scans due to a solitary defect in the interior margin of the right lobe. In these patients, the authors differentiated the gallbladder fossa from a metastatic focus using one of two new hepatobiliary agents: t...


    pub_type: 杂志文章


    authors: Rao BK,Pastakia B,Lieberman LM

    更新日期:1980-08-01 00:00:00

  • The air-fluid level in cavitary pulmonary tuberculosis.

    abstract::Pulmonary tuberculosis has long been associated with the formation of cavities in the lung. Many reports in the literature indicate that the occurrence of air-fluid levels in tuberculosis is unusual. The authors present 18 cases of proved active cavitary tuberculosis where air-fluid levels occurred during the active p...


    pub_type: 杂志文章


    authors: Cohen JR,Amorosa JK,Smith PR

    更新日期:1978-05-01 00:00:00

  • Percutaneous abscess drainage in Crohn disease: technical success and short- and long-term outcomes during 14 years.

    abstract:PURPOSE:To determine technical success with percutaneous abscess drainage (PAD) in patients with Crohn disease during 14 years. MATERIALS AND METHODS:Medical records of 32 patients with Crohn disease who underwent PAD from 1985 to 1999 were reviewed. Results of abscess drainage and nature of subsequent surgical proced...


    pub_type: 杂志文章


    authors: Gervais DA,Hahn PF,O'Neill MJ,Mueller PR

    更新日期:2002-03-01 00:00:00

  • Bowel and mesenteric injury following blunt abdominal trauma: evaluation with CT.

    abstract::Computed tomography (CT) used in cases of blunt abdominal trauma has been found sensitive in detection of bowel and mesenteric injuries and discrimination of operable from nonoperable candidates. In 51 patients with suspected bowel or mesenteric injury following blunt abdominal trauma, CT correctly depicted bowel hema...


    pub_type: 杂志文章


    authors: Rizzo MJ,Federle MP,Griffiths BG

    更新日期:1989-10-01 00:00:00

  • Learning curve for coronary CT angiography: what constitutes sufficient training?

    abstract:PURPOSE:To prospectively evaluate the effect of experience with coronary computed tomographic (CT) angiography on the capability to detect coronary stenoses of 50% or more. MATERIALS AND METHODS:The institutional review board approved the study protocol. All patients gave consent to undergo CT angiography before conve...


    pub_type: 杂志文章


    authors: Pugliese F,Hunink MG,Gruszczynska K,Alberghina F,Malagó R,van Pelt N,Mollet NR,Cademartiri F,Weustink AC,Meijboom WB,Witteman CL,de Feyter PJ,Krestin GP

    更新日期:2009-05-01 00:00:00

  • Radiotherapy for verrucous carcinoma.

    abstract::Radiotherapy of verrucous carcinoma has frequently been associated with anaplastic transformation and poor response. No anaplastic transformation was observed in the 6 patients receiving radiotherapy as the primary treatment, and control of disease was favorable compared with 5 surgically treated patients. Four of the...


    pub_type: 杂志文章


    authors: Schwade JG,Wara WM,Dedo HH,Phillips TL

    更新日期:1976-09-01 00:00:00

  • Krypton-81m: a better radiopharmaceutical for assessment of regional lung function in children.

    abstract::Krypton-81m, an inert, radioactive gas with a physical half-life of 13 seconds was used to evaluate regional lung ventilation in 25 pediatric patients. The results suggest that Kr-81m has several advantages over previous methods employing xenon-133. These include: more favorable physical characteristics for imaging wi...


    pub_type: 杂志文章


    authors: Li DK,Treves S,Heyman S,Kirkpatrick JA Jr,Lambrecht RM,Ruth TJ,Wolf AP

    更新日期:1979-03-01 00:00:00

  • Symptomatic radiographic variants in extremities.

    abstract::Three groups of apparently normal developmental variants in extremities as they appear on radiographs are presented. In contrast to the widely held view that these are of no clinical significance, these ossicles may, in fact, be responsible for symptoms. The first group consists of ossicles which, from the very onset,...


    pub_type: 杂志文章


    authors: Lawson JP

    更新日期:1985-12-01 00:00:00

  • Varicoceles: a coaxial coil occlusion system.

    abstract::A modified transfemoral technique for testicular venography and occlusion of the testicular vein (TV) was used to treat 30 patients with a total of 43 varicoceles (17 left-sided and 13 bilateral). Occlusion was satisfactory in all left varicoceles and 90% of right varicoceles. This coaxial technique facilitates subsel...


    pub_type: 杂志文章


    authors: Berkman WA,Price RB,Wheatley JK,Fajman WA,Sones PJ,Casarella WJ

    更新日期:1984-04-01 00:00:00

  • Tissue relaxation time: in vivo field dependence.

    abstract::Relaxation times (T1 and T2) were measured in vivo in mongrel dogs at fields of 0.3, 0.5, 1.0, 1.35, and 1.5 tesla (T). T1 was measured using nine values of inversion time ranging from 10 to 1,280 msec. T2 was measured with a four-point multiple spin-echo sequence. Relaxation times were calculated for muscle, kidney c...


    pub_type: 杂志文章


    authors: Johnson GA,Herfkens RJ,Brown MA

    更新日期:1985-09-01 00:00:00

  • Dynamic contrast-enhanced subtraction MR angiography of the lower extremities: initial evaluation with a multisection two-dimensional time-of-flight sequence.

    abstract:PURPOSE:To determine the clinical feasibility of a contrast material--enhanced two-dimensional (2D) magnetic resonance (MR) angiographic sequence in lower extremity arteries. MATERIALS AND METHODS:Four healthy volunteers and 12 patients underwent dynamic contrast-enhanced MR angiography; all patients also underwent co...


    pub_type: 杂志文章


    authors: Adamis MK,Li W,Wielopolski PA,Kim D,Sax EJ,Kent KC,Edelman RR

    更新日期:1995-09-01 00:00:00

  • Holoprosencephaly in children: diffusion tensor MR imaging of white matter tracts of the brainstem--initial experience.

    abstract:PURPOSE:To evaluate the dimensions of specific white matter tracts in the brainstems (region of brain thought to be least affected) of children with holoprosencephaly by using diffusion tensor magnetic resonance (MR) imaging and to correlate these abnormalities with forebrain malformation severity and neurologic defici...


    pub_type: 杂志文章


    authors: Albayram S,Melhem ER,Mori S,Zinreich SJ,Barkovich AJ,Kinsman SL

    更新日期:2002-06-01 00:00:00

  • Subcutaneous emphysema, pneumomediastinum, and pneumothorax in diabetic ketoacidosis.

    abstract::The authors report two cases of coexistent pneumomediastinum and diabetic ketoacidosis. One patient had pneumothorax as well. Hyperpnea or vomiting, or a combination of the two, may be the etiologic agent in such cases. The prognosis is excellent and there is prompt regression of the pneumomediastinum following correc...


    pub_type: 杂志文章


    authors: Toomey FB,Chinnock RF

    更新日期:1975-09-01 00:00:00

  • Transcatheter fiberoptic laser coagulation of blood vessels.

    abstract::In ten rabbit ears the central auricular artery was percutaneously catheterized and subjected to doses of laser energy transmitted through a flexible optical fiber within the artery. Arterial occlusion was not produced in the initial three ears using energy levels less than 600 mW. Higher levels of laser energy, in th...


    pub_type: 杂志文章


    authors: O'Reilly GV,Colucci VM,Astorian DG,Schoene WC,Clarke RH,Hammerschlag SB

    更新日期:1982-03-01 00:00:00

  • Sleep apnea syndrome: comparison of MR imaging of the oropharynx with physiologic indexes.

    abstract:PURPOSE:To compare magnetic resonance (MR) imaging of the oropharynx in patients with sleep apnea syndrome with fiberoptic nasopharyngoscopy, and oropharyngeal pressure and apnea index values. MATERIALS AND METHODS:After sleep induction, 24 patients with sleep apnea syndrome and nine patients with non-sleep-apnea snor...


    pub_type: 杂志文章


    authors: Suto Y,Matsuda E,Inoue Y,Suzuki T,Ohta Y

    更新日期:1996-11-01 00:00:00

  • Recurrent hepatocellular carcinoma: percutaneous radiofrequency ablation after hepatectomy.

    abstract:PURPOSE:To evaluate the therapeutic efficacy and safety of percutaneous radiofrequency (RF) ablation for recurrent hepatocellular carcinoma (HCC) in the liver after hepatectomy. MATERIALS AND METHODS:Forty-five patients with 53 recurrent HCC tumors in the liver underwent percutaneous RF ablation with ultrasonographic ...


    pub_type: 杂志文章


    authors: Choi D,Lim HK,Kim MJ,Lee SH,Kim SH,Lee WJ,Lim JH,Joh JW,Kim YI

    更新日期:2004-01-01 00:00:00

  • Small (< or = 2-cm) breast cancer treated with US-guided radiofrequency ablation: feasibility study.

    abstract:PURPOSE:To determine the feasibility and safety of ultrasonographically (US) guided percutaneous radiofrequency (RF) ablation in the local treatment of invasive breast carcinomas 2 cm or less in greatest diameter. MATERIALS AND METHODS:RF ablation of 21 malignant lesions was performed in 20 patients immediately before...


    pub_type: 杂志文章


    authors: Fornage BD,Sneige N,Ross MI,Mirza AN,Kuerer HM,Edeiken BS,Ames FC,Newman LA,Babiera GV,Singletary SE

    更新日期:2004-04-01 00:00:00

  • Detection of Steatohepatitis in a Rat Model by Using Spectroscopic Shear-Wave US Elastography.

    abstract::Purpose To compare low- versus high-frequency ultrasonographic (US) elastography for detection of steatohepatitis in rats by using histopathologic findings as the reference standard. Materials and Methods Between March and September 2014, after receiving approval from the institutional animal care committee, 60 male S...


    pub_type: 杂志文章


    authors: Kazemirad S,Zhang E,Nguyen BN,Bodson-Clermont P,Destrempes F,Trudel D,Cloutier G,Tang A

    更新日期:2017-03-01 00:00:00

  • Normal modiolus: CT appearance in patients with a large vestibular aqueduct.

    abstract:PURPOSE:To determine the computed tomographic (CT) appearance of the normal modiolus and the pathologic alteration in patients with a large vestibular aqueduct and an otherwise normal-appearing cochlea. MATERIALS AND METHODS:Temporal bone CT studies obtained before and after a major upgrade of CT capability in 1992 we...


    pub_type: 杂志文章


    authors: Lemmerling MM,Mancuso AA,Antonelli PJ,Kubilis PS

    更新日期:1997-07-01 00:00:00

  • Duplex ultrasound imaging: vascular applications.

    abstract::A recently developed duplex ultrasonic imaging system that combines high-resolution real-time imaging with simultaneous Doppler analysis provides accurate evaluation of hemodynamically significant occlusive vascular lesions. This system was used in the evaluation of the extracranial carotid arteries, iliofemoral arter...


    pub_type: 杂志文章


    authors: Wetzner SM,Kiser LC,Bezreh JS

    更新日期:1984-02-01 00:00:00

  • Osteoblastoma: clinical and radiologic findings in 98 new cases.

    abstract::The data on 98 new patients with osteoblastoma were studied. The clinical features of pain, scoliosis, and neurologic deficit were largely consistent with those in previous reports. Osteoblastoma is usually a lytic lesion originating in the medulla of bones with matrix ossification and mild surrounding sclerosis. Oste...


    pub_type: 杂志文章


    authors: Kroon HM,Schurmans J

    更新日期:1990-06-01 00:00:00

  • Artifacts in iodine-131 renal images due to coincidence summing of technetium-99m photons.

    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...


    pub_type: 杂志文章


    authors: Harris CC,Wilkinson RH Jr,Schuler FR

    更新日期:1983-02-01 00:00:00

  • Densitometry of single-emulsion film.

    abstract::The measured optical density of single-emulsion films depends on the film orientation. The orientation of the emulsion influences the amount of scattered light entering the detector. It is suggested that this measurement be done with the emulsion side facing the light detector. ...


    pub_type: 杂志文章


    authors: Burgess AE

    更新日期:1977-08-01 00:00:00

  • Evidence of neuronal injury outside the medial temporal lobe in temporal lobe epilepsy: N-acetylaspartate concentration reductions detected with multisection proton MR spectroscopic imaging--initial experience.

    abstract:PURPOSE:To determine whether magnetic resonance (MR) spectroscopic imaging reveals metabolic changes, especially decreased N-acetylaspartate (NAA) concentrations outside the medial temporal lobe in patients with mesial temporal lobe epilepsy (TLE), consistent with neuropathologic findings of extratemporal neuronal impa...


    pub_type: 杂志文章


    authors: Vermathen P,Laxer KD,Schuff N,Matson GB,Weiner MW

    更新日期:2003-01-01 00:00:00

  • Sonography of the normal pediatric gallbladder and biliary tract.

    abstract::Fifty-one pediatric patients (range, 1 mo. to 16 yr.), all of whom had normal clinical findings and laboratory data pertaining to the gallbladder and biliary tract, were examined by ultrasound. Scans showed a gradual increase in the size of the gallbladder with age; only one patient had a gallbladder diameter greater ...


    pub_type: 杂志文章


    authors: McGahan JP,Phillips HE,Cox KL

    更新日期:1982-09-01 00:00:00

  • Coil holder and marker system for MR imaging of the total spine.

    abstract::To improve the efficiency of magnetic resonance imaging of the total spine, the authors developed a coil holder and marker system to accurately localize the level of the spine imaged. The patient's external auditory canal and the alignment light on the imager are lined up with marks on the coil holder. The spine is th...


    pub_type: 杂志文章


    authors: Abrahams JJ,Lange RC

    更新日期:1989-09-01 00:00:00

  • Pulmonary steal syndrome: an unusual case of coronary-bronchial pulmonary artery communication.

    abstract::The authors report a patient with angina pectoris in whom selective left coronary angiography demonstrated that the pulmonary artery branch to an apical lung segment was supplied by a bronchial collateral vessel which arose from the left circumflex artery. The anatomic and physiological developmental mechanisms, and t...


    pub_type: 杂志文章


    authors: Spindola-Franco H,Weisel A,Delman AJ

    更新日期:1978-01-01 00:00:00