The influence of body temperature on image contrast in post mortem MRI

Ruder, Thomas D.; Hatch, Gary M.; Siegenthaler, Lea; Ampanozi, Garyfalia; Mathier, Sandra; Thali, Michael J.; Weber, O.

doi:10.1016/j.ejrad.2011.02.062

Cited by 80 publications

(49 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Notably low temperatures can alter image contrast on PMMR (Figure 3). 20,[26][27][28] Ruder et al 20 found that low body temperatures result in low contrast between fat tissue and muscle tissue on T 2 weighted images, whereas the contrast between fat tissue and fluids increases. Below 20°C, the contrast between fat tissue and muscle tissue is annihilated and T 2 weighted images resemble short tau inversion-recovery (STIR) images.…”

Section: 21mentioning

confidence: 99%

“…Below 20°C, the contrast between fat tissue and muscle tissue is annihilated and T 2 weighted images resemble short tau inversion-recovery (STIR) images. 20 On T 1 weighted images, low body temperatures result in overall low image contrast. 20 Below 10°C, the image contrast deteriorates, 20 which may confound the detection of pathology or injury.…”

Section: 21mentioning

confidence: 99%

“…20 On T 1 weighted images, low body temperatures result in overall low image contrast. 20 Below 10°C, the image contrast deteriorates, 20 which may confound the detection of pathology or injury. 29 These results suggest that the influence of temperature on image quality is less problematic on T 2 weighted than on T 1 weighted images.…”

Section: 21mentioning

confidence: 99%

See 2 more Smart Citations

Essentials of forensic post-mortem MR imaging in adults

Ruder¹,

Thali²,

Hatch³

2014

BJR

123

View full text Add to dashboard Cite

Section: 21mentioning

confidence: 99%

Section: 21mentioning

confidence: 99%

See 1 more Smart Citation

Essentials of forensic post-mortem MR imaging in adults

Ruder¹,

Thali²,

Hatch³

2014

BJR

123

View full text Add to dashboard Cite

“…29 Other changes to the body that may occur after death, such as cooling, will also change the appearance of PMMR and need to be considered. 30 PMMR also has a role in investigation of trauma, not only because of its superior soft tissue contrast resolution but also to assess bone fractures. Clinical scanning with MRI can detect marrow oedema in the absence of a radiologically visible fracture, 31,32 and it is now being used in post-mortem investigation and can be useful to "date" fractures.…”

Section: Traumatic Death and Identificationmentioning

confidence: 99%

Adult post-mortem imaging in traumatic and cardiorespiratory death and its relation to clinical radiological imaging

Morgan¹,

Adlam²,

Robinson³

et al. 2014

BJR

View full text Add to dashboard Cite

The use of post-mortem imaging is expanding throughout the world with increasing use of advanced imaging techniques, such as contrast-enhanced CT and MRI. The questions asked of post-mortem imaging are complex and can be very different, for example for natural sudden death investigation will focus on the cause, whereas for trauma the cause of death is often clear, but injury patterns may be very revealing in investigating the background to the incident. Postmortem imaging is different to clinical imaging regarding both the appearance of pathology and the information required, but there is much to learn from many years of clinical research in the use of these techniques. Furthermore, it is possible that post-mortem imaging research could be used not only for investigating the cause of death but also as a model to conduct clinically relevant research. This article reviews challenges to the development of post-mortem imaging for trauma, identification and cardiorespiratory death, and how they may be influenced by current clinical thinking and practice.

show abstract

“…Therefore, PMMR imaging shows changes in SI in response to lowering body temperature after death. [12][13][14] It is difficult to achieve a consensus on the normal appearance of PMMR because these changes depend on temperature. Therefore, PMMR parameter optimization is needed to obtain appropriate image contrast for bodies at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Inversion Time for Postmortem Short-tau Inversion Recovery (STIR) MR Imaging

et al. 2014

View full text Add to dashboard Cite

Purpose: Signal intensity and image contrast differ between postmortem magnetic resonance (PMMR) images and images acquired from the living body. We sought to achieve sufficient fat suppression with short-tau inversion recovery (STIR) PMMR imaging by optimizing inversion time (TI).Material and Methods: We subjected 37 deceased adult patients to PMMR imaging at 1.5 tesla 8 to 60 hours after confirmation of death and measured T 1 values of areas of subcutaneous fat with relaxation time maps. Rectal temperature (RT) measured immediately after PMMR ranged from 6 to 31°C. We used Pearson's correlation coefficient to analyze the relationship between T 1 and relaxation time (RT). We compared STIR images from 4 cadavers acquired with a TI commonly used in the living body and another TI calculated from the linear regression of T 1 and RT.Results: T 1 values of subcutaneous fat ranged from 89.4 to 182.2 ms. There was a strong, positive, and significant correlation between T 1 and RT (r = 0.91, P < 0.0001). The regression expression for the relationship was T 1 = 2.6*RT + 90 at a field strength of 1.5T. The subcutaneous fat signal was suppressed more effectively with the optimized TI.Conclusion: The T 1 value of subcutaneous fat in PMMR correlates linearly with body temperature. Using this correlation to determine TI, fat suppression with PMMR STIR imaging can be easily improved.

show abstract

The influence of body temperature on image contrast in post mortem MRI

Cited by 80 publications

References 18 publications

Essentials of forensic post-mortem MR imaging in adults

Essentials of forensic post-mortem MR imaging in adults

Adult post-mortem imaging in traumatic and cardiorespiratory death and its relation to clinical radiological imaging

Optimization of Inversion Time for Postmortem Short-tau Inversion Recovery (STIR) MR Imaging

Contact Info

Product

Resources

About