How do the sheilding can rise the entrace surface dose during brain CTA?
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The shielding used in brain CTA can potentially increase the entrance surface dose due to various factors. Shielding bodies enclosing a radiation detector can affect dose evaluation . Size-specific dose estimates (SSDE) for helical head CT examinations show that surface dose can vary with phantom size and beam collimation, with smaller phantoms generally resulting in higher surface doses . Direct measurements of skin dose during CT brain perfusion scans revealed that the standard CTDI100 method tends to overestimate skin doses, emphasizing the importance of accurate measurements for dose optimization . SSDE calculations for pediatric brain CT scans also highlight the importance of accurately estimating absorbed doses for effective radiation dose management . Therefore, shielding can impact entrance surface dose in brain CTA through its interaction with the imaging environment and patient-specific factors.
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9 Citations | Shielding can increase entrance surface dose during brain CTA by altering the dose distribution within the brain parenchyma, impacting the overall dose received by the patient. |
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