Coronary MR angiography with steady-state free precession: individually adapted breath-hold technique versus free-breathing technique.


PURPOSE:To compare image quality and coronary artery stenosis detection with breath-hold (BH) and free-breathing navigator-gated (NAV) coronary magnetic resonance (MR) angiography performed with the same imaging sequence (steady-state free precession) and identical spatial resolution in patients suspected of having coronary artery disease. MATERIALS AND METHODS:Forty consecutive patients suspected of having coronary artery disease underwent steady-state free precession MR imaging of the left or the right coronary artery twice. Correction of breathing motion was performed once with NAV and again with BH. Maximal BH duration and coronary artery rest period were individually determined, and duration of data acquisition was adapted (parallel imaging with different sensitivity encoding factors was used). Quantitative analysis of coronary MR angiography data was performed with multiplanar reformatting software to determine visual score for image quality, vessel sharpness, visible vessel length, and number of visible side branches. Diagnostic accuracy for detection of coronary stenosis of 50% or greater was determined in comparison with results of conventional invasive angiography. The two techniques were compared regarding differences in angiographic parameters with paired Student t testing. chi(2) or Fisher exact testing was used when appropriate. RESULTS:More coronary artery segments were assessable with NAV than with BH MR angiography (254 [79.4%] vs 143 [44.7%] of 320 segments). Overall sensitivity and specificity with NAV were 72% (26 of 36 segments) and 91.7% (200 of 218 segments), versus 63% (12 of 19 segments) and 82.3% (102 of 124 segments) with BH; NAV enabled correct diagnosis in 13% more segments. BH yielded nondiagnostic images in 14 patients, while NAV yielded diagnostic images in all patients. When these 14 patients were excluded, there was a significant increase in visual score for left (3.0 vs 2.4, P <.01) and right (3.3 vs 3.0, P <.05) coronary arteries and no significant difference in vessel sharpness but significant improvement in visible vessel length in left coronary artery (85.9 vs 71.4 mm, P =.003) and number of visible side branches in left (4.9 vs 3.9, P =.04) and right (2.8 vs 2.4, P =.04) coronary arteries on NAV images as compared with BH images. CONCLUSION:Free-breathing NAV was superior to BH coronary MR angiography in terms of image quality and diagnostic accuracy of stenosis detection.






Jahnke C,Paetsch I,Schnackenburg B,Bornstedt A,Gebker R,Fleck E,Nagel E




Has Abstract


2004-09-01 00:00:00














  • Pseudolesions at T1-weighted gradient-echo imaging after administration of superparamagnetic iron oxide: comparison with portal perfusion abnormalities at CT during arterial portography.

    abstract:PURPOSE:To compare specific findings at T1-weighted gradient-echo (GRE) magnetic resonance (MR) imaging performed after administration of superparamagnetic iron oxide (SPIO) with nontumorous regional portal perfusion abnormalities seen at computed tomography (CT) during arterial portography (CTAP). MATERIALS AND METHO...


    pub_type: 杂志文章


    authors: Scharf J,Hoffmann V,Lehnert T,Anselm H,Richter GM,Kauffmann GW

    更新日期:1998-04-01 00:00:00

  • Dual-source radiofrequency transmission with patient-adaptive local radiofrequency shimming for 3.0-T cardiac MR imaging: initial experience.

    abstract:PURPOSE:To evaluate the effect of dual-source parallel radiofrequency (RF) transmission with patient-adaptive local RF shimming on image quality, image contrast, and diagnostic confidence at routine clinical cardiac magnetic resonance (MR) imaging with use of a 3.0-T dual-channel transmit whole-body MR system. MATERIA...


    pub_type: 杂志文章


    authors: Mueller A,Kouwenhoven M,Naehle CP,Gieseke J,Strach K,Willinek WA,Schild HH,Thomas D

    更新日期:2012-04-01 00:00:00

  • Artifacts produced by moving grids.

    abstract::Anti-scatter grids reduce the amount of secondary radiation contributing to the image and improve the signal-to-noise ratio. However, they may also lead to the creation of linear artifacts representing the shadows of the radiopaque septa. Grid motion perpendicular to the septa during the exposure can cause blurring of...


    pub_type: 杂志文章


    authors: Bednarek DR,Rudin S,Wong R

    更新日期:1983-04-01 00:00:00

  • Appendicitis in children: color Doppler sonography.

    abstract::The authors used color Doppler ultrasonography (US) to evaluate 33 children with suspected appendicitis and found locally increased blood flow in all of 10 patients with appendicitis or periappendiceal abscess; the studies were normal in 16 patients without appendicitis. The gray-scale sonographic results were concord...


    pub_type: 杂志文章


    authors: Quillin SP,Siegel MJ

    更新日期:1992-09-01 00:00:00

  • Common bile duct calculi: updated experience with dissolution with methyl tertiary butyl ether.

    abstract::The authors describe their experience with methyl tertiary butyl ether (MTBE) in a larger series of patients than previously reported in order to acquaint physicians with both its effectiveness for dissolution of common bile duct calculi and the limitations of its use. Ten patients with 13 biliary calculi underwent pe...


    pub_type: 杂志文章


    authors: Brandon JC,Teplick SK,Haskin PH,Sammon JK,Muhr WF,Hofmann AF,Gambescia RA,Zitomer N

    更新日期:1988-03-01 00:00:00

  • Joint effusion in children with an irritable hip: US diagnosis and aspiration.

    abstract::Ninety-six children with an irritable hip possibly representing septic arthritis underwent clinical and laboratory evaluation, radiography, and ultrasonography (US). Forty had normal US scans; none were later shown to have septic arthritis, although three had osteomyelitis. Fifty-six children had effusion at US. Thirt...


    pub_type: 杂志文章


    authors: Zawin JK,Hoffer FA,Rand FF,Teele RL

    更新日期:1993-05-01 00:00:00

  • White Matter by Diffusion MRI Following Methylphenidate Treatment: A Randomized Control Trial in Males with Attention-Deficit/Hyperactivity Disorder.

    abstract::BackgroundMethylphenidate (MPH) is highly effective in treating attention-deficit/hyperactivity disorder (ADHD). However, not much is known about its effect on the development of human brain white matter (WM).PurposeTo determine whether MPH modulates WM microstructure in an age-dependent fashion in a randomized double...


    pub_type: 杂志文章,随机对照试验


    authors: Bouziane C,Filatova OG,Schrantee A,Caan MWA,Vos FM,Reneman L

    更新日期:2019-10-01 00:00:00

  • Variations in acromial ossification simulating infant abuse in victims of sudden infant death syndrome.

    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...


    pub_type: 杂志文章


    authors: Kleinman PK,Spevak MR

    更新日期:1991-07-01 00:00:00

  • Bronchiolitis obliterans syndrome: thin-section CT diagnosis of obstructive changes in infants and young children after lung transplantation.

    abstract:PURPOSE:To characterize the thin-section computed tomographic (CT) appearance of bronchiolitis fibrosa obliterans syndrome in infants and young children after lung transplantation. MATERIALS AND METHODS:Thin-section CT studies in six patients with bronchiolitis obliterans syndrome (age range, 2 months to 5 1/2 years) ...


    pub_type: 杂志文章


    authors: Lau DM,Siegel MJ,Hildebolt CF,Cohen AH

    更新日期:1998-09-01 00:00:00

  • Intraductal papillary mucinous tumors of the pancreas: helical CT with histopathologic correlation.

    abstract:PURPOSE:To evaluate the accuracy of preoperative computed tomography (CT) in predicting the location and type of ductal involvement and malignant transformation in intraductal papillary mucinous (IPM) pancreatic tumors and to determine the predictive factors for malignancy at CT. MATERIALS AND METHODS:The helical CT s...


    pub_type: 杂志文章


    authors: Taouli B,Vilgrain V,Vullierme MP,Terris B,Denys A,Sauvanet A,Hammel P,Menu Y

    更新日期:2000-12-01 00:00:00

  • Regional distribution of emphysema: correlation of high-resolution CT with pulmonary function tests in unselected smokers.

    abstract::High-resolution computed tomography (CT) was correlated with pulmonary function tests in the evaluation of regional emphysema in 59 smokers. The lung was divided into upper (above the carina tracheae) and lower (below the carina tracheae) zones, and the degree of emphysema was graded with a subjective and an objective...


    pub_type: 杂志文章


    authors: Gurney JW,Jones KK,Robbins RA,Gossman GL,Nelson KJ,Daughton D,Spurzem JR,Rennard SI

    更新日期:1992-05-01 00:00:00

  • Ultrasound mammography for the augmented breast.

    abstract::Ultrasound examinations were performed on 25 women with augmented breasts using whole-breast water-path scanning. In these patients, ultrasound imaged carcinoma, benign lesions, and fibrous capsule formation; these were confirmed by surgery. In addition, it was noted that certain prostheses appeared to be displaced po...


    pub_type: 杂志文章


    authors: Cole-Beuglet C,Schwartz G,Kurtz AB,Patchefsky AS,Goldberg BB

    更新日期:1983-03-01 00:00:00

  • Timeliness of follow-up after abnormal screening mammogram: variability of facilities.

    abstract:PURPOSE:To describe the timeliness of follow-up care in community-based settings among women who receive a recommendation for immediate follow-up during the screening mammography process and how follow-up timeliness varies according to facility and facility-level characteristics. MATERIALS AND METHODS:This was an inst...


    pub_type: 杂志文章


    authors: Rosenberg RD,Haneuse SJ,Geller BM,Buist DS,Miglioretti DL,Brenner RJ,Smith-Bindman R,Taplin SH,Breast Cancer Surveillance Consortium.

    更新日期:2011-11-01 00:00:00

  • Are gadolinium-based contrast media really safer than iodinated media for digital subtraction angiography in patients with azotemia?

    abstract::Gadolinium chelates, intended as intravenous contrast media for magnetic resonance imaging, have been regarded as nonnephrotoxic and recommended to replace iodinated contrast media in patients with azotemia who are undergoing digital subtraction angiography (DSA). High intraarterial doses (up to 220 mmol of gadodiamid...


    pub_type: 杂志文章,评审


    authors: Nyman U,Elmståhl B,Leander P,Nilsson M,Golman K,Almén T

    更新日期:2002-05-01 00:00:00

  • Evolution of a protocol for ketamine-induced sedation as an alternative to general anesthesia for interventional radiologic procedures in pediatric patients.

    abstract:PURPOSE:To establish a protocol for credentialed pediatric radiology nurses, with radiologist supervision, to administer ketamine to induce sedation and analgesia during interventional radiologic procedures. MATERIALS AND METHODS:This study was conducted in two phases. The goal of the first phase was to develop a seda...


    pub_type: 杂志文章


    authors: Mason KP,Michna E,DiNardo JA,Zurakowski D,Karian VE,Connor L,Burrows PE

    更新日期:2002-11-01 00:00:00

  • Brain parenchyma motion: measurement with cine echo-planar MR imaging.

    abstract::With echo-planar magnetic resonance (MR) imaging, the authors measured the intrinsic pulsatile motion of brain parenchyma. Phase-sensitive, electrocardiography-gated, two-dimensional cine images were acquired throughout the cardiac cycle by using a spin-echo, blipped echo-planar MR pulse sequence. Transverse and coron...


    pub_type: 杂志文章


    authors: Poncelet BP,Wedeen VJ,Weisskoff RM,Cohen MS

    更新日期:1992-12-01 00:00:00

  • Cerebral vasculopathy and neurologic sequelae in infants with cervicofacial hemangioma: report of eight patients.

    abstract:PURPOSE:To determine the association of cerebral arterial anomalies and progressive cerebral arterial occlusive disease in infants with facial hemangiomas. MATERIALS AND METHODS:The cases of eight infants (seven girls and one boy) with the diagnosis of cervicofacial hemangioma and intracranial arterial anomalies were ...


    pub_type: 杂志文章


    authors: Burrows PE,Robertson RL,Mulliken JB,Beardsley DS,Chaloupka JC,Ezekowitz RA,Scott RM

    更新日期:1998-06-01 00:00:00

  • The diagnosis of pneumothorax by ventilation-perfusion imaging.

    abstract::Two patients with pneumothorax had ventilation-perfusion studies to rule out the possibility of pulmonary embolism; the presence of air in the pleural space was not known to the authors when the study was analyzed. A typical ventilatory pattern characterized by small volume difference at total lung capacity followed b...


    pub_type: 杂志文章


    authors: Dhekne RD,Burdine JA

    更新日期:1978-10-01 00:00:00

  • Type II endoleak after endoaortic graft implantation: diagnosis with helical CT arteriography.

    abstract:PURPOSE:To retrospectively assess endoleak shapes and locations within aneurysms to differentiate type II from type I and type III endoleaks. MATERIALS AND METHODS:The institutional review board granted an exemption for this HIPAA-compliant study; patient informed consent was not required. A retrospective review of ar...


    pub_type: 杂志文章


    authors: Chernyak V,Rozenblit AM,Patlas M,Cynamon J,Ricci ZJ,Laks MP,Veith FJ

    更新日期:2006-09-01 00:00:00

  • Development and evaluation of a needle for percutaneous ethanol injection therapy.

    abstract::To avoid the disadvantages associated with use of the traditional percutaneous transhepatic cholangiography (PTC) needle in ultrasonically guided percutaneous ethanol injection therapy (PEIT) for hepatocellular carcinoma, the authors developed a needle with a three-sided tip and three holes within 3 mm of the tip. In ...


    pub_type: 杂志文章


    authors: Akamatsu K,Miyauchi S,Ito Y,Ohkubo K,Maruyama M

    更新日期:1993-01-01 00:00:00

  • Hemodynamic Responses of the Placenta and Brain to Maternal Hyperoxia in Fetuses with Congenital Heart Disease by Using Blood Oxygen-Level Dependent MRI.

    abstract::Background Impaired brain development in fetuses with congenital heart disease (CHD) may result from inadequate cerebral oxygen supply in utero. Purpose To test whether fetal cerebral oxygenation can be increased by maternal oxygen administration, effects of maternal hyperoxia on blood oxygenation of the placenta and ...


    pub_type: 杂志文章


    authors: You W,Andescavage NN,Kapse K,Donofrio MT,Jacobs M,Limperopoulos C

    更新日期:2020-01-01 00:00:00

  • Corrosive esophageal stricture: safety and effectiveness of balloon dilation.

    abstract::The safety and long-term effectiveness of fluoroscopically guided balloon dilation for corrosive esophageal stricture was evaluated in 22 patients with a follow-up period of more than 1 year (range, 13-52 months). The average interval between corrosive agent ingestion and initial balloon dilation was 18 years (range, ...


    pub_type: 杂志文章


    authors: Song HY,Han YM,Kim HN,Kim CS,Choi KC

    更新日期:1992-08-01 00:00:00

  • Thyroid imaging with high-field-strength surface-coil MR.

    abstract::Magnetic resonance (MR) imaging of the thyroid was performed with a 1.5-T system and local receiver coil in 19 "healthy" subjects and 34 patients with various focal and diffuse thyroid disorders. The normal gland was typically homogeneous with increased intensity relative to that of muscle on images obtained with long...


    pub_type: 杂志文章


    authors: Gefter WB,Spritzer CE,Eisenberg B,LiVolsi VA,Axel L,Velchik M,Alavi A,Schenck J,Kressel HY

    更新日期:1987-08-01 00:00:00

  • Modification of a serial film changer for frontal magnification angiography.

    abstract::A movable carriage was designed and built for a Franklin film changer to facilitate routine serial 2 times magnification. This simple device permits magnification angiography without major equipment purchases or room alterations. ...


    pub_type: 杂志文章


    authors: Spitzer RM,Olsson HE,Gibson BJ

    更新日期:1975-11-01 00:00:00

  • Hemolytic-uremic syndrome: intrarenal arterial Doppler patterns as a useful guide to therapy.

    abstract::Seventeen children with acute renal failure due to the hemolytic-uremic syndrome were examined with duplex Doppler ultrasound. Serial measurements of intrarenal arterial pulsatility were obtained by means of the Pourcelot index. These were compared with daily urine volume, both during the phase of renal failure (durin...


    pub_type: 杂志文章


    authors: Patriquin HB,O'Regan S,Robitaille P,Paltiel H

    更新日期:1989-09-01 00:00:00

  • Chronic portosystemic encephalopathy: embolization of portosystemic shunts.

    abstract::Operative ligation of portosystemic shunts is effective in controlling chronic portosystemic encephalopathy (CPSE) but is associated with significant mortality. Review of the records of five patients with CPSE treated with radiologic occlusion procedures showed that these are suitable alternatives to surgery. Three pa...


    pub_type: 杂志文章


    authors: Uflacker R,Silva Ade O,d'Albuquerque LA,Piske RL,Mourão GS

    更新日期:1987-12-01 00:00:00

  • Bedside chest radiography: diagnostic efficacy.

    abstract::In order to evaluate the efficacy of bedside chest radiography, a prospective study was completed of 140 patients admitted to the surgical and medical intensive care units over a two-month period. A total of 1132 consecutive bedside radiographs was analyzed for malposition of tubes and lines and interval changes in th...


    pub_type: 杂志文章


    authors: Henschke CI,Pasternack GS,Schroeder S,Hart KK,Herman PG

    更新日期:1983-10-01 00:00:00

  • Prostatic carcinoma and benign prostatic hyperplasia: MR imaging with histopathologic correlation.

    abstract::Twenty-eight patients with prostatic carcinoma who underwent magnetic resonance (MR) imaging and subsequent radical prostatectomy were studied. The resected prostates were sectioned axially, and the whole-mount prostatic specimen was compared with the corresponding MR images. The carcinoma could be identified in 20 ca...


    pub_type: 杂志文章


    authors: Kahn T,Bürrig K,Schmitz-Dräger B,Lewin JS,Fürst G,Mödder U

    更新日期:1989-12-01 00:00:00

  • Hepatic CT enhancement. Part I. Alterations in the volume of contrast material within the same patients.

    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 ...


    pub_type: 杂志文章


    authors: Chambers TP,Baron RL,Lush RM

    更新日期:1994-11-01 00:00:00

  • Bilateral venography of the lower extremities.

    abstract::The authors describe a simplified method of venography of the lower extremity which gives improved visualization of the proximal deep venous system. The technique involves high volumes of contrast material, no tourniquets, a relatively vertical, non-weight-bearing position, and passive elevation of the legs. ...


    pub_type: 杂志文章


    authors: Rampton JB,Armstrong JD Jr

    更新日期:1977-06-01 00:00:00