What question did this study set out to answer?

To evaluate the dose-effect relationships and relative biological effectiveness of single and fractionated 300 kV X-rays and 15 MeV neutrons on late spinal cord injury.

July 1, 1974British Journal of Radiology

Late effects of spinal cord irradiation with 300 kV X rays and 15 MeV neutrons

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To evaluate the dose-effect relationships and relative biological effectiveness of single and fractionated 300 kV X-rays and 15 MeV neutrons on late spinal cord injury.
Irradiated the cervical or lumbar spinal cord of rats using single or fractionated doses of 300 kV X-rays and 15 MeV neutrons.
Tracked animals across a 4- to 12-month latent period to observe the emergence of radiation myelopathy.
Performed histological evaluations of white matter and nerve roots in irradiated spinal regions.
Latent periods to myelopathy ranged from 4 to 12 months and decreased with higher radiation doses to a plateau minimum of 4 months for both radiation types.
The relative biological effectiveness (RBE) of 15 MeV neutrons was 1.1 for single exposures and increased to 1.7 when delivered in five daily fractions.
Histological injury presented as nerve root degeneration following lumbar irradiation, whereas cervical irradiation led to focal white matter necrosis.

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Implication

Preclinical study demonstrates dose-dependent myelopathy and higher biological effectiveness for fractionated neutrons in rats, highlighting region-specific radiation vulnerability.

Cite This Study

Kogel et al. (1974) studied this question.

synapsesocial.com/papers/6aa53ca822b0548423395b0f https://doi.org/10.1259/0007-1285-47-559-393

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Implication

Preclinical study demonstrates dose-dependent myelopathy and higher biological effectiveness for fractionated neutrons in rats, highlighting region-specific radiation vulnerability.

Late effects of spinal cord irradiation with 300 kV X rays and 15 MeV neutrons

Key Points

Discussion

Implication

Cite This Study

Late effects of spinal cord irradiation with 300 kV X rays and 15 MeV neutrons

Key Points

Discussion

Implication

Cite This Study

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