How accurate are measurements on MRI? a study on multiple sclerosis using reliable 3D stereological methods

Gadeberg, Paula; Gundersen, H.J.G.; Tågehøj, Finn

doi:10.1002/(sici)1522-2586(199907)10:1<72::aid-jmri10>3.0.co;2-q

Cited by 19 publications

(2 citation statements)

References 20 publications

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“…Moreover, the tonsils are soft tissue anatomic structures, which, during positioning, could be affected by the pressure exerted by nearby structures, and this could modify their shape and position. It is desirable if the MRI study is performed to evaluate the tonsils using oblique scans, one on each side, or to perform 3D sequences, which, in the absence of inter-slice gaps, allow for a more precise spatial evaluation, especially of very small anatomical structures [11,12]. The thickness of the slices in our study ranged from 3 to 4 mm, with an interslice gap of 10% of the slice thickness; since the tonsils are millimetric anatomical structures (the largest dimension found was 5.5 mm), it is easy to lose information with a non-targeted setting of the slice.…”

Section: Discussionmentioning

confidence: 91%

Evaluation of Presumptive Normal Feline Tonsils with Low-Field Magnetic Resonance Imaging: A Preliminary Retrospective Study

Rosto,

Del Signore,

Bernabò

et al. 2023

Veterinary Sciences

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Palatine tonsils are lymphoid organs, whose anatomic localization gives them a role against antigens entering the body during feeding and breathing. In human medicine, MRI is used to investigate tonsillar diseases. In veterinary medicine, a recent study on healthy dogs described the MRI appearance of canine palatine tonsils, with no available reports about feline ones. Due to the similarities between animals and humans, and based on the study on canine tonsils, the authors aimed to evaluate the feasibility of low-field MRI to detect and describe presumed normal features of feline palatine tonsils, assessing the finding’s reproducibility. Low-field MRI of the heads of 14 cats was reviewed, and qualitative findings (visualization, shape, margins, signal intensity, and pattern) and size of each tonsil were recorded. Each observer recorded 71% of the expected tonsils. Most of them were classified as oval, ill-defined, and hyperintense structures with both homogeneous and heterogeneous signal patterns; the overall agreement was considered good. Low-field MRI is potentially a useful imaging modality to visualize palatine tonsils in cats, and their normal appearance has been described for the first time. The authors recommend the evaluation of tonsils in the transverse plane and consider the most accurate estimation of the short axis.

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Section: Discussionmentioning

confidence: 91%

Evaluation of Presumptive Normal Feline Tonsils with Low-Field Magnetic Resonance Imaging: A Preliminary Retrospective Study

Rosto,

Del Signore,

Bernabò

et al. 2023

Veterinary Sciences

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“…STT) increases the risk of pain, but we cannot exclude this. Astereological MRI method (Gadeberg et al, 1999) instead of conventional MRI techniques might have estimated the whole plaque load more precisely and thereby reduced the bias of measurement.…”

Section: Discussionmentioning

confidence: 99%

MRI of the central nervous system in MS patients with and without pain

Svendsen

Sørensen

Jensen

et al. 2011

European Journal of Pain

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Influence of positional and angular variation of automatically planned short‐axis stacks on quantification of left ventricular dimensions and function with cardiovascular magnetic resonance

Danilouchkine

Geest

Westenberg

et al. 2005

Magnetic Resonance Imaging

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Purpose: To theoretically and experimentally investigate the influence of the automated cardiovascular magnetic resonance (CMR) scan planning pitfalls, namely inaccurate positioning and tilting of short-axis (SA) imaging planes, on quantification of the left ventricular (LV) dimensions and function. Materials and Methods:Eleven healthy subjects and eight patients underwent CMR. Manually and automatically planned SA sets were acquired. To obtain the quantitative measurements of LV function, one observer performed image analysis twice. The agreement between planning methods, as well as the decomposition of the total variation into interstudy and intraobserver components was measured. Results:The decomposition of the total variation showed that the interstudy factor accounts for 70 -85% of the total variation, while the rest is due to the intraobserver factor. Moreover, the relative contribution of the interstudy factor remains independent from errors in slice positioning and small angular deviation of SA stacks from the optimal orientation. Good agreement between the theoretical and measured variability factors was observed. Conclusion:Global LV function derived from the automatically planned CMR acquisitions yield accurate quantification of the human cardiovascular system. Inaccurate positioning and tilting of SA images does not affect the quantitative measurements of LV function. The computeraided system for automated CMR has proven clinical applicability.

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How accurate are measurements on MRI? a study on multiple sclerosis using reliable 3D stereological methods

Cited by 19 publications

References 20 publications

Evaluation of Presumptive Normal Feline Tonsils with Low-Field Magnetic Resonance Imaging: A Preliminary Retrospective Study

Evaluation of Presumptive Normal Feline Tonsils with Low-Field Magnetic Resonance Imaging: A Preliminary Retrospective Study

MRI of the central nervous system in MS patients with and without pain

Influence of positional and angular variation of automatically planned short‐axis stacks on quantification of left ventricular dimensions and function with cardiovascular magnetic resonance

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