Use of a 1.0 Tesla open scanner for evaluation of pediatric and congenital heart disease: a retrospective cohort study

Autor: Adam L. Dorfman, Jimmy C. Lu, Prachi P. Agarwal, Layne Morowitz, James C. Nielsen, Maryam Ghadimi Mahani, El-Sayed H. Ibrahim, Muzammil Musani
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Male
Michigan
Heart disease
Signal-To-Noise Ratio
Magnetic resonance angiography
Bicuspid aortic valve
Body Size
Child
Tetralogy of Fallot
Medicine(all)
Observer Variation
Radiological and Ultrasound Technology
medicine.diagnostic_test
Age Factors
Equipment Design
Middle Aged
Coronary Vessels
Phobic Disorders
Right coronary artery
Child
Preschool
cardiovascular system
Female
Radiology
Cardiology and Cardiovascular Medicine
Artifacts
circulatory and respiratory physiology
Adult
Heart Defects
Congenital
medicine.medical_specialty
Adolescent
New York
Magnetic Resonance Imaging
Cine
Phobic disorder
Young Adult
Predictive Value of Tests
medicine.artery
Image Interpretation
Computer-Assisted
medicine
Humans
Radiology
Nuclear Medicine and imaging
Congenital heart disease
Retrospective Studies
business.industry
Research
Myocardium
Reproducibility of Results
Magnetic resonance imaging
medicine.disease
Open scanner
Cross-Sectional Studies
Claustrophobia
1.0 Tesla
business
Magnetic Resonance Angiography
Zdroj: Journal of Cardiovascular Magnetic Resonance
ISSN: 1532-429X
1097-6647
Popis: Background: Open cardiovascular magnetic resonance (CMR) scanners offer the potential for imaging patients with claustrophobia or large body size, but at a lower 1.0 Tesla magnetic field. This study aimed to evaluate the efficacy of open CMR for evaluation of pediatric and congenital heart disease. Methods: This retrospective, cross-sectional study included all patients ≤18 years old or with congenital heart disease who underwent CMR on an open 1.0 Tesla scanner at two centers from 2012–2014. Indications for CMR and clinical questions were extracted from the medical record. Studies were qualitatively graded for image quality and diagnostic utility. In a subset of 25 patients, signal-to-noise (SNR) and contrast-to-noise (CNR) ratios were compared to size- and diagnosis-matched patients with CMR on a 1.5 Tesla scanner. Results: A total of 65 patients (median 17.3 years old, 60% male) were included. Congenital heart disease was present in 32 (50%), with tetralogy of Fallot and bicuspid aortic valve the most common diagnoses. Open CMR was used due to scheduling/equipment issues in 51 (80%), claustrophobia in 7 (11%), and patient size in 3 (5%); 4 patients with claustrophobia had failed CMR on a different scanner, but completed the study on open CMR without sedation. All patients had good or excellent image quality on black blood, phase contrast, magnetic resonance angiography, and late gadolinium enhancement imaging. There was below average image quality in 3/63 (5%) patients with cine images, and 4/15 (27%) patients with coronary artery imaging. SNR and CNR were decreased in cine and magnetic resonance angiography images compared to 1.5 Tesla. The clinical question was answered adequately in all but 2 patients; 1 patient with a Fontan had artifact from an embolization coil limiting RV volume analysis, and in 1 patient the right coronary artery origin was not well seen. Conclusions: Open 1.0 Tesla scanners can effectively evaluate pediatric and congenital heart disease, including patients with claustrophobia and larger body size. Despite minor artifacts and differences in SNR and CNR, the majority of clinical questions can be answered adequately, with some limitations with coronary artery imaging. Further evaluation is necessary to optimize protocols and image quality.
Databáze: OpenAIRE
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