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Whole body MRI: improved lesion detection and characterization with diffusion weighted techniques.

Attariwala R, Picker W - J Magn Reson Imaging (2013)

Bottom Line: Theory, b-value selection, common artifacts and target to background for optimized viewing will be reviewed for applications in the neck, chest, abdomen, and pelvis.DWI, when used in conjunction with routine imaging, can assist in detecting hemorrhagic degradation products, infection/abscess, and inflammation in colitis, while aiding with discrimination of free fluid and empyema, while limiting the need for intravenous contrast.DWI in conjunction with routine anatomic images provides a platform to improve lesion detection and characterization with findings rivaling other combined anatomic and functional imaging techniques, with the added benefit of no ionizing radiation.

View Article: PubMed Central - PubMed

Affiliation: AIM Medical Imaging, Vancouver, BC, Canada. attariwala@gmail.com

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Related in: MedlinePlus

Axial b-500 (a) readily demonstrates the increased signal from localized pyelonephritis, which cannot be identified on axial T2 (b) images. The subtle loss of arterial phase enhancement from pyelonephritis is shown in (c), with near complete loss of lesion conspicuity on delayed contrast enhanced images (d).
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fig11: Axial b-500 (a) readily demonstrates the increased signal from localized pyelonephritis, which cannot be identified on axial T2 (b) images. The subtle loss of arterial phase enhancement from pyelonephritis is shown in (c), with near complete loss of lesion conspicuity on delayed contrast enhanced images (d).

Mentions: DWI provides valuable functional information about lesions throughout the kidney, which can be seen to greater advantage than by conventional anatomic techniques. The cortical renal changes that occur in early childhood demonstrate increasing ADC with age, with the most rapid change occurring in the first year of life 70. The effect of pyelonephritis can readily be identified by DWI 71,72, without the use of contrast material (Fig. 11), whereas the findings by anatomic imaging and vascular enhancement can be subtle. The increase in viscosity of pyonephrosis can be demonstrated by a decrease in ADC values within the renal collecting system 73.


Whole body MRI: improved lesion detection and characterization with diffusion weighted techniques.

Attariwala R, Picker W - J Magn Reson Imaging (2013)

Axial b-500 (a) readily demonstrates the increased signal from localized pyelonephritis, which cannot be identified on axial T2 (b) images. The subtle loss of arterial phase enhancement from pyelonephritis is shown in (c), with near complete loss of lesion conspicuity on delayed contrast enhanced images (d).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3795449&req=5

fig11: Axial b-500 (a) readily demonstrates the increased signal from localized pyelonephritis, which cannot be identified on axial T2 (b) images. The subtle loss of arterial phase enhancement from pyelonephritis is shown in (c), with near complete loss of lesion conspicuity on delayed contrast enhanced images (d).
Mentions: DWI provides valuable functional information about lesions throughout the kidney, which can be seen to greater advantage than by conventional anatomic techniques. The cortical renal changes that occur in early childhood demonstrate increasing ADC with age, with the most rapid change occurring in the first year of life 70. The effect of pyelonephritis can readily be identified by DWI 71,72, without the use of contrast material (Fig. 11), whereas the findings by anatomic imaging and vascular enhancement can be subtle. The increase in viscosity of pyonephrosis can be demonstrated by a decrease in ADC values within the renal collecting system 73.

Bottom Line: Theory, b-value selection, common artifacts and target to background for optimized viewing will be reviewed for applications in the neck, chest, abdomen, and pelvis.DWI, when used in conjunction with routine imaging, can assist in detecting hemorrhagic degradation products, infection/abscess, and inflammation in colitis, while aiding with discrimination of free fluid and empyema, while limiting the need for intravenous contrast.DWI in conjunction with routine anatomic images provides a platform to improve lesion detection and characterization with findings rivaling other combined anatomic and functional imaging techniques, with the added benefit of no ionizing radiation.

View Article: PubMed Central - PubMed

Affiliation: AIM Medical Imaging, Vancouver, BC, Canada. attariwala@gmail.com

Show MeSH
Related in: MedlinePlus