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The Goal of IGRT
The primary goal of image-guided radiation therapy (IGRT) is to improve local control and reduce impending side effects. Uncertainties can arise from inter and intra fractional motions. During treatment or even sometimes prior to, the imaging provides direct confirmation that the beams are targeting the exact location of the tumour. Any shifts or corrections detected by the imaging can be made to ensure the proper treatment. Highly conformal, highly modulated, and escalated dosing schemes are being used more routinely. If slight errors are not detected prior to the execution of treatment, there is a possibility of under or overdosing not only the intended area, but critical structures as well. IGRT provides the ability to ensure that the tumor is being property targeted while limiting toxicities to normal structures.
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Question of
Non-detection of errors before starting treatment could:
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Make the entire IGRT ineffective.
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Ensure proper treatment under difficult conditions.
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Lead to improper dosage being administered.
Correct Wrong
The paragraph discusses the importance of detecting errors in image-guided radiation therapy (IGRT) to ensure that the treatment targets the exact location of the tumor. If errors are not detected before starting treatment, there is a risk of administering the wrong dosage, either by underdosing or overdosing the targeted area or affecting critical structures nearby. This highlights the crucial role of detecting errors to prevent improper dosage and maintain the efficacy and safety of the treatment. Options A and B do not directly address the issue of dosage, which is why C is the correct choice.
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