What is multimodality imaging?

Multimodality imaging is widely considered to involve the incorporation of two or more imaging modalities, usually within the setting of a single examination using, for example, dual- or triple-labeled optical or nuclear medicine “reporter” agents or by performing ultrasound or optical studies within the MR, single- …

What is imaging in radiation therapy?

Image-guided radiation therapy (IGRT) is the use of imaging during radiation therapy to improve the precision and accuracy of treatment delivery. IGRT is used to treat tumors in areas of the body that move, such as the lungs.

Is radiation therapy an imaging modality?

As a result, imaging is now a pervasive component of radiation therapy with all major imaging modalities represented and numerous examples in which these modalities have been adapted to the treatment machine to allow increased accuracy and precision in the delivery of dose.

How is MRI used in radiotherapy?

In the context of radiotherapy planning, such measurements are helpful in designing treatment plans to avoid critical structures. MRI signals can be made sensitive to diffusion processes in tissue by inserting paired pulses of magnetic field gradient in spin-echo sequences.

What is meant by multimodality?

Multimodality refers to the interplay between different representational modes, for instance, between images and written/spoken word. Multimodal representations mediate the sociocultural ways in which these modes are combined in the communication process (Kress & Van Leeuwen 2001, p. 20).

Which rays are frequently used in radiation therapy?

Radiation therapy uses high-energy particles or waves, such as x-rays, gamma rays, electron beams, or protons, to destroy or damage cancer cells. Your cells normally grow and divide to form new cells.

Why is CT used for radiotherapy planning?

CT images used in radiotherapy treatment planning must serve two key purposes: to allow, with high geometric fidelity, the position of the tumour and surrounding tissues along with organs at risk to be accurately identified and to provide a map of the electron density information for the various tissues to be used in …

What is the future of radiation oncology?

Radiation oncologists will be trained in public and global health approaches. The radiation oncologists’ role will shift toward science and to multidisciplinary decision making and to dedicated and intensive counseling during the patient’s treatment.

What kind of radiation does MRI use?

Unlike X-ray, CT, and PET scans, MRIs do not use radiation and is considered a non-invasive procedure. Instead, MRIs use a strong magnetic field and radio waves to take pictures of your brain.