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. 2019 Jul/Aug;43(4):623-627.
doi: 10.1097/RCT.0000000000000888.

DIfferential Subsampling With Cartesian Ordering With Respiratory Triggering Versus Conventional Liver Acquisition With Volume Acquisition: A Multiple Reader Preference Study

Brian C Allen  1 , Wendy L Ehieli  1 , Benjamin Wildman-Tobriner  1 , Mohammad Chaudhry  1 , Erol Bozdogan  1 , Gemini Janas, James Ronald  1 , Mustafa R Bashir
Affiliations

DIfferential Subsampling With Cartesian Ordering With Respiratory Triggering Versus Conventional Liver Acquisition With Volume Acquisition: A Multiple Reader Preference Study

Brian C Allen et al. J Comput Assist Tomogr. 2019 Jul/Aug.

Abstract

Objective: The aim of this study was to compare respiratory-triggered DIfferential Subsampling with Cartesian Ordering (rtDISCO) and breath-held Liver Acquisition with Volume Acquisition (LAVA) image quality.

Methods: In this institutional review board-approved, Health Insurance Portability and Accountability Act-compliant prospective study, 25 subjects underwent T1 imaging with rtDISCO and LAVA before and after intravenous contrast. Three readers scored individual series and side-by-side comparisons for motion and noise. Eight clinical tasks were qualitatively assessed.

Results: As individual series, readers rated rtDISCO images as more degraded by motion on both precontrast (mean rtDISCO score, 2.7; LAVA, 1.6; P < 0.001) and postcontrast images (rtDISCO, 2.4; LAVA, 1.8; P < 0.001). Readers preferred LAVA images based on motion on both precontrast (mean preference, -1.2; P < 0.001) and postcontrast images (mean preference, -0.7; P < 0.001) on side-by-side assessment. There was no preference between sequences for 6 of 8 clinical tasks on postcontrast images.

Conclusions: Readers preferred LAVA with respect to motion but not noise; there was no preference in most of the tested clinical tasks.

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Figures

Fig. 1.
Fig. 1.
38-year-old female with metastatic colon adenocarcinoma. (A) Axial T1w (LAVA) in the equilibrium phase. In the individual series review, all three readers rated the image has having minimal motion; two of the readers rated the image has having no significant noise, while one reader rated the image as having minimal noise. (B) Axial T1w (rtDISCO) in the equilibrium phase. In the individual series review, one reader rated the image as having moderate motion and minimal noise, while the other two readers rated the image as having minimal motion and no noise.
Fig. 1.
Fig. 1.
38-year-old female with metastatic colon adenocarcinoma. (A) Axial T1w (LAVA) in the equilibrium phase. In the individual series review, all three readers rated the image has having minimal motion; two of the readers rated the image has having no significant noise, while one reader rated the image as having minimal noise. (B) Axial T1w (rtDISCO) in the equilibrium phase. In the individual series review, one reader rated the image as having moderate motion and minimal noise, while the other two readers rated the image as having minimal motion and no noise.
Fig. 2.
Fig. 2.
42-year-old male with abnormal liver function tests. (A) Axial T1w (LAVA) without IV contrast and (B) axial T1w (rtDISCO) without IV contrast. In the side-by-side analysis, all three readers strongly preferred the LAVA image (A) with respect to motion. Two readers mildly preferred the LAVA image (A) with respect to noise, while the third reader had no preference between the images for noise.
Fig. 2.
Fig. 2.
42-year-old male with abnormal liver function tests. (A) Axial T1w (LAVA) without IV contrast and (B) axial T1w (rtDISCO) without IV contrast. In the side-by-side analysis, all three readers strongly preferred the LAVA image (A) with respect to motion. Two readers mildly preferred the LAVA image (A) with respect to noise, while the third reader had no preference between the images for noise.
See this image and copyright information in PMC

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