Marc Dewey1, Tania Schink, Charles F Dewey. 1. Department of Radiology, Charité, Medical School, Humboldt-Universität zu Berlin, Berlin, Germany. marc.dewey@charite.de
Abstract
PURPOSE: To evaluate whether MR scanners with acoustic noise reduction and a short magnetic bore reduce the rate of claustrophobic reactions. MATERIALS AND METHODS: We performed a cohort study in an outpatient setting, enrolling a total of 55,734 consecutive patients referred for MRI of any part of the body based on a clinical indication. Imaging was performed using a conventional MR scanner (42,998 patients) and a recently developed MR scanner (12,736 patients) with 97% acoustic noise reduction and a short bore. Multiple logistic regression analysis was used to adjust for the nonrandomized design. RESULTS: In addition to those undergoing head-first examinations, female and middle-aged patients were significantly more likely to develop claustrophobia in the logistic regression analysis (P < 0.001). The rate of claustrophobic reactions was significantly lower with the recent MR scanner (0.7%; 95% confidence interval [CI]: 0.6-0.9%) than with the conventional scanner (2.1%; 95% CI, 2.0-2.3%; P < 0.001) with an adjusted odds ratio (OR) of 3.1 (95% CI, 2.5-3.9) and a number needed to treat of 72 (95% CI, 63-85). CONCLUSION: The incidence of claustrophobia may be reduced by a factor of 3 when recently-developed MR scanners are used.
PURPOSE: To evaluate whether MR scanners with acoustic noise reduction and a short magnetic bore reduce the rate of claustrophobic reactions. MATERIALS AND METHODS: We performed a cohort study in an outpatient setting, enrolling a total of 55,734 consecutive patients referred for MRI of any part of the body based on a clinical indication. Imaging was performed using a conventional MR scanner (42,998 patients) and a recently developed MR scanner (12,736 patients) with 97% acoustic noise reduction and a short bore. Multiple logistic regression analysis was used to adjust for the nonrandomized design. RESULTS: In addition to those undergoing head-first examinations, female and middle-aged patients were significantly more likely to develop claustrophobia in the logistic regression analysis (P < 0.001). The rate of claustrophobic reactions was significantly lower with the recent MR scanner (0.7%; 95% confidence interval [CI]: 0.6-0.9%) than with the conventional scanner (2.1%; 95% CI, 2.0-2.3%; P < 0.001) with an adjusted odds ratio (OR) of 3.1 (95% CI, 2.5-3.9) and a number needed to treat of 72 (95% CI, 63-85). CONCLUSION: The incidence of claustrophobia may be reduced by a factor of 3 when recently-developed MR scanners are used.
Authors: Stuart A Taylor; Susan Mallett; Anne Miles; Stephen Morris; Laura Quinn; Caroline S Clarke; Sandy Beare; John Bridgewater; Vicky Goh; Sam Janes; Dow-Mu Koh; Alison Morton; Neal Navani; Alfred Oliver; Anwar Padhani; Shonit Punwani; Andrea Rockall; Steve Halligan Journal: Health Technol Assess Date: 2019-12 Impact factor: 4.014
Authors: Jessica C Hsu; Pratap C Naha; Kristen C Lau; Peter Chhour; Renee Hastings; Brianna F Moon; Joel M Stein; Walter R T Witschey; Elizabeth S McDonald; Andrew D A Maidment; David P Cormode Journal: Nanoscale Date: 2018-09-20 Impact factor: 7.790