Dixon sequence imp in contrast-enhanced phase

A 57-year-old female patient with breast biopsy sections who underwent a mammogram for high-risk screening

Image: A. The axial T1-weighted fat-unsaturated MR image shows no region of the signal space. No reader detected a clip using this sequence. The contrast-enhanced Dixon image shows a signal void in the right breast (arrow), which corresponds to the MammoMark/CorMark Bread Tie biopsy section. The three readers detected a syllable in this sequence, with confidence scores of 4, 3, and 2; All evaluations are rated as true positive (ie, detected with confidence score ≥2).
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Credit: ARRS/AJR

Leesburg, Virginia, September 14, 2022According to ARRS American Journal of Oncology (AJR)enhanced in-phase Dixon sequencing could reduce the need for correlation between other imaging modalities to better identify areas of prior biopsy during breast MRI interpretation.

Compared with clinical sequences, phase contrast-enhanced Dixon had higher sensitivity for detection of breast biopsy sections on MRI, as well as higher reader confidence and contrast-to-noise ratio (CNR), without change in positive predictive value (PPV),” the corresponding author wrote. and the first participant, Michael W Taylor ChuMD, master of public health, from Duke University Medical Center in Durham, North Carolina.

Dr. Taylor Chu and team’s retrospective study numbered 164 women (mean age, 50.3 years) with a total of 281 breast biopsy sections who underwent contrast-enhanced breast MRI between January 2, 2019 and April 16, 2020. Sequence information, biopsy section details In this study, three radiologists independently commented on their findings for three clinical sequences—T1-weighted (T1W) non-fat-suppressed (NFS), STIR, and phase I lipid-suppressed T1W dynamic contrast (FS)—plus Dixon in Enhanced phase contrast. Then confidence was scored on a scale of 1-4.

Finally, compared to T1W NSF, STIR, and T1WFS sequences, phase contrast-enhanced Dixon sequencing showed the highest sensitivity for breast biopsy section detection (85.1% vs. 26.6%–78.2%), highest reader confidence (3.5 vs. 1.7–3.0), and highest rate A refined rate (4.05 vs. 0.54–1.21), with no significant difference in PPV (96.4% vs. 92.2%-96.1%).

The use of Dixon sequencing in contrast-enhanced phase may “help address the current challenge of interpretation of routine clinical breast MRI”, the authors of this AJR Conclude the article.

The first radiological society in North America, the American Roentgen Ray Association (ARRS) remains dedicated to advancing medicine through the profession of medical imaging and allied sciences. International Forum for Advances in Radiology Since the discovery of X-rays, ARRS maintains its mission to improve health through a community committed to advancing knowledge and skills through the world’s longest-running journal of radiology constantly published –American Journal of Oncology—ARRS Annual Meeting, Doing excercise Magazine, topic seminars, and countless multimedia educational materials, as well as scholarships awarded via Roentgen finance®.

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