Comparison of Sagittal T2-Weighted BLADE and Fast Spin-Echo MRI of the Female Pelvis for Motion Artifact and Lesion Detection

Lane, Barton; Vandermeer, Fauzia Q.; Oz, Rasim C.; Irwin, Eric W.; McMillan, A.; Wong-You-Cheong, Jade J.

doi:10.2214/ajr.10.5918

Cited by 49 publications

(33 citation statements)

References 21 publications

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“…While no ghosting artefacts were present on the BLADE images, streak artefacts were visible around the bladder and abdominal wall. Although abdominal and/or femoral adipose tissue occasionally aliased into the periphery of the FOV as reported previously for the brain [4], kidneys [12] or female pelvis [6, 8], this did not significantly hamper diagnostic efficacy. In cases where gynaecological lesions are present in the centre of the FOV away from aliasing artefacts, BLADE images would allow better evaluation of these solid lesions and thus might improve diagnostic confidence (Figs.…”

Section: Discussionsupporting

confidence: 67%

“…This technique is less susceptible not only to bulk motion but also to flow-related artefacts from vessels, and has been evaluated for replacing sequences with conventional Cartesian k-space acquisition in the brain [5]. Recent work by Lane et al [6], Koyama et al [7], Fujimoto et al [8] and Haneder et al [9] demonstrated the potential of this technique to improve image quality in the small pelvis by reducing motion artefacts resulting from bowel peristalsis, breathing and abdominal wall motion. However, these authors focused primarily on visual and qualitative assessment of images.…”

Section: Introductionmentioning

confidence: 99%

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Should less motion sensitive T2-weighted BLADE TSE replace Cartesian TSE for female pelvic MRI?

et al. 2012

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ObjectivesTo prospectively compare the diagnostic performance of a non-Cartesian k-space sampling T2-weighted TSE BLADE sequence with a conventional T2-weighted TSE sequence in female pelvic organs.MethodsForty-seven patients with sonographically indeterminate adnexal masses or uterine lesions underwent sagittal BLADE and conventional TSE at 1.5 T after glucagon administration. Two radiologists independently determined their preferred sequence by rating: overall image diagnostic quality, conspicuity of the zonal anatomy and delineation of pathologies of the uterus and cervix, presence of artefacts, and of fluid in the pouch of Douglas (Wilcoxon signed rank test). Signal-to noise ratios (SNRs) and contrast-to-noise ratios (CNRs) were measured for the myometrium versus the rectus abdominis muscle (Student’s t-test).ResultsBLADE significantly (p < 0.0001) reduced motion and ghosting artefacts and showed improved conspicuity (p = 0.3/0.24), but overall image quality did not differ significantly (inter-observer agreement BLADE κ = 0.89; TSE κ = 0.84). In the majority of cases (53.2 % vs 59.6 %, respectively, κ = 0.82) radiologists preferred conventional TSE due to better image contrast (p < 0.0001) and visibility of free pelvic fluid (p ≤ 0.0001). SNR (TSE 57.5 ± 37.7; BLADE 16.6 ± 12.2) and CNR (TSE 40.4 ± 33.5; BLADE 7.2 ± 8.8) were significantly higher on conventional TSE (p < 0.0001).ConclusionsAlthough BLADE reduces motion artefacts and provides a clearer delineation of uterine zonal anatomy compared with conventional TSE, this comes at the expense of overall contrast.Main Messages• Use of BLADE may reduce T2 contrast and thus visibility of free pelvic fluid or cystic structures• Non-Cartesian sampling of k-space such as BLADE is beneficial due to less motion sensitivity• BLADE provides clearer delineation and conspicuity of uterine zonal anatomy on pelvic MRIs

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Section: Discussionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Should less motion sensitive T2-weighted BLADE TSE replace Cartesian TSE for female pelvic MRI?

et al. 2012

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“…The readers recorded the segment of the bowel from which the peristalsis-related streak artifact originated (duodenum, jejunum, ileum, or colon), the organ that the artifact most affected (e.g., in liver tissue, in mesenteric fat, in bowel wall), and the qualitative artifact severity. The qualitative artifact severity was recorded on a 4-point scale: 1 = absence of streak artifact—full visibility of all surrounding tissues; 2 = minor or minimal streak artifact—minimal reduction of visibility of surrounding soft tissue; 3 = some or moderate streak artifact—moderately reduced visibility of surrounding soft tissue 4 = marked streak artifact—no anatomical details visible in the surrounding tissue [12]. For the qualitative readout of the phantom study, the surrounding simulated lesions were assessed by the Likert-scale described for scoring the patient scans.…”

Section: Methodsmentioning

confidence: 99%

Reduction of peristalsis-related gastrointestinal streak artifacts with dual-energy CT: a patient and phantom study

et al. 2016

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Objective The purpose of the study was to assess the ability of rapid-kV switching (rs) dual-energy computed tomography (DECT) to reduce peristalsis-related streak artifact. Methods rsDECT images of 100 consecutive patients (48 male, 52 female, mean age 57 years) were retrospectively evaluated in this institutional review board–approved study. Image reconstructions included virtual monochromatic 70 and 120 keV images, as well as iodine(-water) and water(-iodine) material decomposition images. We recorded the presence and severity of artifacts qualitatively (4-point scale) and quantitatively [iodine/water concentrations, Hounsfield units, gray scale values (GY)] and compared to corresponding unaffected reference tissue. Similar measures were obtained in DECT images of a peristalsis phantom. Wilcoxon signed-rank and paired t tests were used to compare results between different image reconstructions. Results Peristalsis-related streak artifacts were found in 49 (49%) of the DECT examinations. Artifacts were significantly more severe in 70, 120, and water(-iodine) images than in iodine(-water) images (qualitative readout P < 0.001, each). Quantitative measurements were significantly different between the artifact and the reference tissue in 70, 120 keV, and water(-iodine) images (P < 0.001 for both HU and GY for each image reconstruction), but not significantly different in iodine(-water) images (iodine concentrations P = 0.088 and GY P = 0.111). Similar results were seen in the peristalsis DECT phantom study. Conclusions Peristalsis-related streak artifacts seen in 70, 120 keV, and water(-iodine) images are substantially reduced in iodine(-water) images at rsDECT.

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“…Analogous observations in the pelvis have been reported. [8] Radial artifacts can be minimized by appropriate attention to blade width and oversampling parameters.…”

Section: Protocol Developmentmentioning

confidence: 99%

Establishing a Chest MRI Practice and its Clinical Applications: Our Insight and Protocols

Lee

White

Sykes

2014

Journal of Clinical Imaging Science

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Despite its nonionizing technique and exquisite soft tissue characterization, noncardiovascular, and nonmusculoskeletal magnetic resonance imaging (MRI) of the chest has been considered impractical due to various challenges such as respiratory motion, cardiac motion, vascular pulsatility, air susceptibility, and paucity of signal in the lung. With advances in MRI, it is now possible to perform diagnostically useful and good quality MRIs of the chest, but literature on subspecialized chest MRI practices is limited. The purpose of this manuscript is to describe the rationale, nuances, and logistics that went into developing such a practice in the Division of Thoracic Radiology at our institution. The topics addressed include technical and clinical considerations, support at administrative and clinical levels, protocol development, and economic considerations compared with conventional practices. Various MRI techniques are also specifically discussed to facilitate chest MRI at other sites. Although chest MRI is used in a relatively small number of patients at this point, in certain patients, chest MRI can provide additional information to optimize medical management. A few clinical cases illustrate the quality and clinical utility of chest MRI. Given recent advances in MRI techniques, it is now an opportune time to develop a chest MRI practice.

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Comparison of Sagittal T2-Weighted BLADE and Fast Spin-Echo MRI of the Female Pelvis for Motion Artifact and Lesion Detection

Abstract: Imaging of uterine junctional zone anatomy, ovaries, and fibroids was improved and artifacts were reduced with BLADE compared with FSE. Radial artifact introduced by the BLADE sequence and slightly longer imaging times needed for the BLADE sequence were offset by improved image quality.

Cited by 49 publications

References 21 publications

Should less motion sensitive T2-weighted BLADE TSE replace Cartesian TSE for female pelvic MRI?

Should less motion sensitive T2-weighted BLADE TSE replace Cartesian TSE for female pelvic MRI?

Reduction of peristalsis-related gastrointestinal streak artifacts with dual-energy CT: a patient and phantom study

Establishing a Chest MRI Practice and its Clinical Applications: Our Insight and Protocols

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