Should abbreviated breast MRI be compliant with American College of Radiology requirements for MRI accreditation?
Magn Reson Imaging
; 72: 87-94, 2020 10.
Article
in En
| MEDLINE
| ID: mdl-32622851
ABSTRACT
OBJECTIVE:
To evaluate non-inferiority and diagnostic performance of an American College of Radiology compliant abbreviated MRI protocol (AB-MRI) compared with standard-of-care breast MRI (SOC-BMRI) in patients with increased breast cancer risk. MATERIAL ANDMETHODS:
Women with increased lifetime breast cancer risk by American Cancer Society guidelines underwent breast MRI at a single institution between October 2015 and February 2018. AB-MRI was acquired at 3.0 T with T2-weighted extended fast spin echo triple-echo Dixon and pre- and post-contrast 3D dual-echo fast spoiled gradient echo two-point Dixon sequences with an 8-channel breast coil 1-7 days after SOC-BMRI. Three readers independently reviewed AB-MRI and assigned BI-RADS categories for maximum intensity projection images (AB1), dynamic contrast-enhanced (DCE) images (AB2), and DCE and non-contrast T2 and fat-only images (AB3). These scores were compared to those from SOC-BMRI.RESULTS:
Cancer yield was 14 per 1000 (women-years) in 73 women aged 26-75 years (mean 53.5 years). AB-MRI acquisition times (mean 9.63 min) and table times (mean 15.07 min) were significantly shorter than those of SOC-BMRI (means 19.46 and 36.3 min, respectively) (p < .001). Accuracy, sensitivity, specificity, and positive and negative predictive values were identical for AB3 and SOC-BMRI (93%, 100%, 93%, 16.7%, and 100%, respectively). AB-MRI with AB1 and AB2 had significantly lower specificity (AB1 = 73.6%, AB2 = 77.8%), positive predictive values (AB1 = 5%, AB2 = 5.9%), and accuracy (AB1 = 74%, AB2 = 78%) than those of SOC-BMRI (p = .002 for AB1, p = .01 for AB2).CONCLUSION:
AB-MRI was acquired significantly faster than SOC-BMRI and its diagnostic performance was non-inferior. Inclusion of T2 and fat-only images was necessary to achieve non-inferiority by multireader evaluation.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radiology
/
Societies, Medical
/
Breast
/
Magnetic Resonance Imaging
/
Guideline Adherence
/
Accreditation
Type of study:
Diagnostic_studies
/
Guideline
/
Prognostic_studies
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Middle aged
Country/Region as subject:
America do norte
Language:
En
Journal:
Magn Reson Imaging
Year:
2020
Document type:
Article