Abstract #1975

Diagonal DWI: A Time-efficient Alternative to 3-scan Trace DWI for Breast Lesion Evaluation at 3.0T - Phantom Study and Clinical Assessment

Yusuke Jo¹, Mami Iima^1,2, Yutaka Kato³, Yunhao Zhang¹, Hiroko Satake¹, Yuki Sato¹, Kazushige Ichikawa³, Satoko Ishigaki¹, Ryota Hyodo^1,2, Yoshito Ichiba⁴, and Shinji Naganawa¹

¹Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan, ²Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Nagoya, Japan, ³Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan, ⁴Siemens Healthcare K.K., Tokyo, Japan

Synopsis

Keywords: Breast, Breast, diffusion

Motivation: Diffusion-weighted imaging (DWI) optimization in breast MRI protocols faces challenges between image quality and acquisition efficiency. Diagonal DWI (dDWI) potentially offers advantages over traditional 3-scan trace DWI (tDWI).

Goal(s): Compare traditional tDWI and dDWI for breast lesion evaluation at 3.0T MRI, focusing on image quality metrics.

Approach: Seventy consecutive patients underwent both tDWI and dDWI protocols at 3.0T MRI. Comparative analysis included phantom ADC measurements, quantitative metrics (SNR and CNR), and independent qualitative scoring by two board-certified radiologists.

Results: dDWI achieved 38% faster acquisition time with tendency of slightly better conspicuity, while tDWI showed superior SNR/CNR. ADC measurements demonstrated strong agreement between techniques.

Impact: This study demonstrates diagonal DWI as a time-efficient alternative to traditional DWI in breast imaging protocols, potentially improving clinical workflow while maintaining diagnostic accuracy.

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