Focal liver lesions detection: Comparison of respiratory-triggering, triggering and tracking navigator and tracking-only navigator in diffusion-weighted imaging

Bouchaibi, Saïd El; Coenegrachts, Kenneth; Bali, Maria Antonietta; Absil, Julie; Metens, Thierry; Matos, Celso

doi:10.1016/j.ejrad.2015.06.018

Cited by 12 publications

(12 citation statements)

References 29 publications

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“…Since EPI is a rapid technique, imaging of the entire liver can be performed during one or two breath‐holds . However, breath‐hold EPI suffers from poor SNR . More commonly, DWI is acquired using respiratory triggering, or a free‐breathing technique with averaging of multiple acquisitions.…”

Section: Pitfalls In Diffusion‐weighted Imaging (Dwi) / Apparent Diffmentioning

confidence: 99%

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Pitfalls in liver MRI: Technical approach to avoiding misdiagnosis and improving image quality

Yacoub

Elsayes

Fowler

et al. 2018

Magnetic Resonance Imaging

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The following is an illustrative review of common pitfalls in liver MRI that may challenge interpretation. This article reviews common technical and diagnostic challenges encountered when interpreting dynamic multiphasic T1‐weighted imaging, hepatobiliary phase imaging, and diffusion‐weighted imaging of the liver. Additionally, each section includes suggestions for avoiding diagnostic and technical errors. Level of Evidence: 5 Technical Efficacy: Stage 2 J. Magn. Reson. Imaging 2019;49:41–58.

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Section: Pitfalls In Diffusion‐weighted Imaging (Dwi) / Apparent Diffmentioning

confidence: 99%

“…76 However, breath-hold EPI suffers from poor SNR. 78 More commonly, DWI is acquired using respiratory triggering, or a freebreathing technique with averaging of multiple acquisitions. Free breathing with averaging of multiple acquisitions is operator-independent and has high SNR because of signal averaging.…”

Section: Misregistration Artifactmentioning

confidence: 99%

Pitfalls in liver MRI: Technical approach to avoiding misdiagnosis and improving image quality

Yacoub

Elsayes

Fowler

et al. 2018

Magnetic Resonance Imaging

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“…Indeed, our DWI scanning was performed using this respiration triggered approach. However, technical advances such as navigator based triggering have been recently implemented to improve image quality and to reduce acquisition time [26] , [27] , [28] . Thus, comparison of the image quality of each c-DWI created from DWIs with different respiration triggered approaches might be an interesting next project.…”

Section: Discussionmentioning

confidence: 99%

Diffusion-weighted MR imaging of non-complicated hepatic cysts: Value of 3T computed diffusion-weighted imaging

Nakamura

Higaki

Akiyama

et al. 2016

European Journal of Radiology Open

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PurposeTo investigate the utility of computed 3T diffusion-weighted imaging (c-DWI) for the diagnosis of non-complicated hepatic cysts with a focus on the T2 shine-through effect.Materials and methodsIn 50 patients with non-complicated hepatic cysts we acquired one set of DWIs (b-value 0 and 1000 s/mm2) at 1.5T, and two sets at 3T (b-value 0 and 1000 s/mm2, TE 70 ms; b-value 0 and 600 s/mm2, TE 60 ms). We defined the original DWIs acquired with b = 1000 s/mm2 at 1.5T and 3T as “o-1.5T-1000” and “o-3T-1000”. c-DWIs were calculated with 3T DWI at b-values of 0 and 600 s/mm2. c-DWI with b = 1000 and 1500 s/mm2 were defined as “c-1000” and “c-1500”. Radiologists evaluated the signal intensity (SI) of the cysts using a 3-point score where 1 = not visible, 2 = discernible, and 3 = clearly visible. They calculated the contrast ratio (CR) between the cysts and the surrounding liver parenchyma on each DWIs and recorded the apparent diffusion coefficient (ADC) with a b-value = 0 and 1000 s/mm2 on 1.5T- and 3T DWIs.ResultsCompared with o-1.5T-1000 DWI, the visual scores of all but the c-1500 DWIs were higher (p = 0.07 for c-1500- and p < 0.01 for the other DWIs). The CR at b = 1000 s/mm2 was higher on o-3T-1000- than on o-1.5T-1000- (p < 0.01) but not higher than on c-1500 DWIs (p = 0.96). The CR at b = 0 s/mm2 on 3T images with TE 70 ms was higher than on 1.5T images (p < 0.01). The ADC value was higher for 3T- than 1.5T images (p < 0.01).ConclusionsNon-complicated hepatic cysts showed higher SI on o-3T-1000- than o-1.5T-1000 DWIs due to the T2-shine through effect. This high SI was suppressed on c-1500 DWIs.

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“…Axial FSE-HT 2 W imaging with breath-hold technique and axial DWI with a fat-suppressed single-shot fast spin echo-echo planar imaging and three different b-values (50,400 and 800 s/mm 2 ) by respiratory-triggered technique were performed on all patients. The respiratory-triggered technique avoid breathing motion artifacts by synchronizing the image acquisition with the cycle of breathing and acquiring the image data at the end expiratory phase [10]. The detailed parameters for MRI sequences are shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Respiratory Triggered Diffusion-Weighted MRI with Three b-Values Compared to ADC Map and Fast Spin Echo Heavily T2W in Differential Diagnosis of Hemangioma from Malignant Liver Lesions

Khorram

Faeghi

Jafarisepehr

et al. 2018

Journal of Medical Imaging and Radiation Sciences

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The goal of this study was to evaluate the ability of diffusion-weighted imaging (DWI) with three different b-values compared to apparent diffusion coefficient (ADC) map and fast spin echo heavily T 2 weighted (FSE-HT 2 W) in differential diagnosis of hemangioma from malignant liver lesions. Methods: Fifty-four liver lesions in 20 patients (12 females and eight males: mean age of 52 AE 12.3 years) were examined in this study. FSE-HT 2 W with breath-hold technique and DWI using respiratory triggered with three different b-values (50,400 and 800 s/mm 2) were performed on all patients. Mean ADC values were calculated from each lesion. Agreement levels of each sequence with standard of reference were compared by constructing the receiver operating characteristics (ROC) curve and calculation of the area under the ROC curve. Results: ADC maps had the largest area under the ROC curve and also the most agreement with the standard of reference. DWI obtained with high b-value (b-800 s/mm 2) and FSE-HT 2 W technique were ranked next, respectively. Hemangiomas had significantly higher ADC values than malignant liver lesions (P ¼ .001). No significant differences were seen in gender, age, and lesion size between two lesion groups. Conclusions: ADC maps and DWI in high b-values are more successful than FSE-HT 2 W technique in differential diagnosis of hemangioma from malignant liver lesions.

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Focal liver lesions detection: Comparison of respiratory-triggering, triggering and tracking navigator and tracking-only navigator in diffusion-weighted imaging

Cited by 12 publications

References 29 publications

Pitfalls in liver MRI: Technical approach to avoiding misdiagnosis and improving image quality

Pitfalls in liver MRI: Technical approach to avoiding misdiagnosis and improving image quality

Diffusion-weighted MR imaging of non-complicated hepatic cysts: Value of 3T computed diffusion-weighted imaging

Evaluation of Respiratory Triggered Diffusion-Weighted MRI with Three b-Values Compared to ADC Map and Fast Spin Echo Heavily T2W in Differential Diagnosis of Hemangioma from Malignant Liver Lesions

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