Diagnostic Imaging

Endoscopes use fiber optic cables that transmit light through total internal reflection, allowing doctors to see inside the body. Regular reflection would cause light to escape, while diffraction and polarization are unrelated principles.

Lithotripsy is the medical procedure that uses shock waves to break down kidney stones into smaller pieces that can be passed naturally. The term comes from Greek: 'lithos' (stone) and 'tripsis' (breaking or rubbing). The other options are not recognized medical terms for this procedure.

A stethoscope is a medical instrument used to listen to internal sounds of the body, particularly heartbeats, lung sounds, and intestinal sounds. This process is called auscultation. It helps doctors diagnose various conditions by listening to abnormal sounds.

MRI stands for Magnetic Resonance Imaging, a medical imaging technique using strong magnetic fields and radio waves to create detailed body images without radiation. 'Marginal', 'Reasoning', and 'Refresher' are incorrect.

Arthroscopy is a minimally invasive surgical procedure used to examine and treat problems inside joints. It allows surgeons to view the joint interior using an arthroscope.

Endoscopy uses fiber optic cables that rely on total internal reflection to transmit light through flexible tubes. Light repeatedly reflects internally along the fiber wall, allowing visualization of internal body structures. Interference, diffraction, and polarization are unrelated optical phenomena.

Triple assessment for breast cancer diagnosis combines three components: clinical breast examination by a doctor, imaging (mammography/ultrasound/MRI), and tissue biopsy (FNAC or core needle). All three together provide diagnostic confirmation when cancer is suspected.

CT stands for Computerized Tomography, which uses X-rays to create detailed cross-sectional images of the body. 'Tomography' comes from Greek 'tomos' (slice) and 'graph' (to write/draw). Options A, B, and D contain incorrect terms - Topography is the study of surface features, while Tapography and Tamography are not real medical terms.

To produce an ultrasound, a piezoelectric crystal has an alternating current applied across it. The piezoelectric crystal grows and shrinks depending on the voltage run through it. Running an alternating current through it causes it to vibrate at a high speed and to produce an ultrasound. This conversion of electrical energy to mechanical energy is known as the piezoelectric effect.

This fills the gap between the premises and conclusion. Otherwise, the author would have no reason to recommend radiography over surgery.

The diagnosis of all circulating B cell tumours relies on the involvement of the bone marrow. However for solid tumours, such as Hodgkin's disease and Non-Hodgkin's lymphoma, a lymph node biopsy is the essential investigation, though bone marrow trephine is often done to assess stage

This is the correct option, as all of the above are the uses of ultrasonic waves. 

Cauterization is the burning of part of a body to remove or close off a part of it.

An atherectomy is a procedure in which the vascular surgeon inserts a specialized catheter into a blocked artery to remove a buildup of atherosclerotic plaque from within the vessel. It is typically used to treat blockages where angioplasty and stenting cannot be performed.