Which applications, either for diagnostic purposes or for therapeutic purposes, do not involve ionizing radiation? Check all that apply. CT scan MRI ultrasound laser surgery radiopharmaceuticals PET scan

Ionizing radiations are radiation which have sufficien energy to ionize an atom. Example of ionizing radiation are x rays, gamma rays and all particle radiation from radioactive decay

CT Scan

CT scan is an abbreviated form of computerized tomography. CT scan provide more information about a body than x-rays. In this test a sequence of x-ray images are taken at various angle of a body and these images after computer processing provide information about the body. Since x-ray is ionizing radiation so in CT scan ionizing radiations are used.

Ultrasound

In ultra sound scan high frequency sound waves(which are not ionizing radiation) are used to find the information about a body.

MRI

MRI is an abbreviated form of Magnetic resonance imaging. In MRI scanning high intensity magnetic field and radio waves(which are not ionizing radiation) are used to find the information of a body.

Laser surgery

It is a type of surgery in which laser beam(which are not ionizing radiation) is used to cut the skin or to remove a lesion from skin surface.

Radiopharmaceuticals PET scan

PET scan is an abbreviated form of positron emission tomography scan. This test is used to find the images of a body to detect certain diseases like cancer and heart diseases in your body. In this test radioactive tracers are used. In this test ionizing radiation are used.