Unit 1: Modalities & Clinical Practice Procedures

Sonography

Uses high-frequency sound waves based on the SONAR

principle; highly technologist-dependent

Computed Tomography (CT)

Employs highly sophisticated computerized X-ray equipment;

key in fast-paced stroke and trauma care.

Magnetic Resonance (MRI)

Uses high-strength magnetic fields and radio frequencies to

visualize structures.

Diagnostic Radiography

Conventional radiography of skull, spine, chest, extremities, GI,

and GU; considered entry-level

Nuclear Medicine / PET

Involves administering radioactive materials so that the patient

becomes the source of radiation.

Radiation Therapy

Uses therapeutic range X-rays exceeding diagnostic levels to kill

cancer cells or provide palliation.

Nuclear Medicine features a unique concept where the traditional diagnostic physical setup is inverted. Explain what is meant by the statement: 'The patient becomes the of radiation.' How are X-rays or radiation emitted in this scenario

The patient becomes the source of radiation means the patient is given a radioactive material (radiotracer). Once inside the body, the material emits radiation from within the patient, which is detected by the imaging equipment to create an image.

In Radiation Therapy, clinical specialists treat cancer using highly sophisticated machinery. What is unique about the X-rays used in this field compared to standard Diagnostic Radiography, and why are clinical practitioners' technical skills considered secondary to sensitivity and empathy?

The X-rays used in radiation therapy are therapeutic-range and their energy far exceeds the diagnostic range in order to effectively kill cancer cells or reduce symptoms. Palliative care and cancer treatments are highly stressful for patients; thus, a technologist's primary qualities must be sensitivity and empathy, making technical skills secondary.