Keywords:
Breast, MR, Acceptance testing, Comparative studies, Diagnostic procedure, Economics, Patterns of Care
Authors:
S. A. H. hassanein, R. Habib; Shibin El Kom/EG
DOI:
10.26044/ecr2019/C-0560
Methods and materials
Patient population:
A retrospective review of 143 breast MRI examinations performed at our institution in the last three years and present at the department workstation,
was performed by two radiologists (with 7 and 5 years of experience in breast imaging).
Two sets of images were reviewed separately and blindly.
The first set consisted of the proposed abbreviated protocol consisting of the first post-contrast subtracted images [FAST] and its maximum-intensity projection [MIP] (figure 2) Fig. 2 .
The second set consisted of the full diagnostic protocol at our institution.
Data acquisition:
All MRI examinations were performed using a 1.5 Tesla (T) system (Toshiba Vantage,
Toshiba Medical Systems,
Japan) dedicated breast coil.
Patients were scanned in the prone position with adequate positioning within the coil to avoid folding of the skin or compression of the breast tissue.
All patients underwent the full diagnostic protocol including,
axial T1WI,
axial T2WI with fat suppression,
sagittal T2WI with fat suppression for both breasts and the dynamic study 3D GR fat-sat) which included a pre-contrast as well as five series after intravenous contrast injection (gadopentetate dimeglumine- magnevist ® Bayer Schering Pharma AG,
Berlin,
Germany- at a dose of 0.1 mL/kg injected as a bolus followed by saline injection) taken at 60 seconds' interval.
The glomerular filtration rate of all patients was checked before contrast injection (with GFR> 30 considered suitable for IV contrast injection).
On the workstation,
the examinations were grouped into two sets,
the full protocol and the proposed abbreviated protocol consisted of the first post-contrast subtracted images [FAST] and its maximum-intensity projection [MIP] .
Data analysis:
The two radiologists reviewed the two sets separately and blindly interpreted them with recording of the findings (number of detected malignant and benign lesions) and the time of reporting for each set of images was recorded.
Statistical analysis
All statistical calculations were done using computer program IBM SPSS (Statistical Package for the Social Science; IBM Corp,
Armonk,
NY,
USA) release 22 for Microsoft Windows.