longer medical imaging quizzes

What is histology?

The microscopic study of cells and tissues in their natural tissue environment.

Primary purpose of histology?

To diagnose disease by examining tissue architecture and cellular morphology.

What specimen is examined in histology?

Biopsy tissue.

What does microbiology study?

Microorganisms that cause infectious disease.

Gold standard for diagnosing wound infections?

Wound culture.

Purpose of wound culture?

Identify the organism and determine antibiotic susceptibility.

What does Gram-positive mean?

Bacteria retain crystal violet stain due to thick peptidoglycan cell wall.

Common Gram-positive cause of skin infections?

Staphylococcus aureus.

Best fluid for diagnosing meningitis?

Cerebrospinal fluid.

Why is CSF used for meningitis?

It surrounds the brain and spinal cord where infection occurs.

Gold standard test for osteoporosis?

DEXA Scan.

DEXA measures what?

Bone mineral density.

MRI uses what?

Magnetic fields and radiofrequency waves.

MRI is best for imaging what?

Soft tissues.

MRI does NOT use what?

Ionizing radiation.

CT uses what?

X-rays.

CT is best for what?

Trauma, fractures, internal bleeding, abdominal emergencies.

X-ray best visualizes what?

Bone.

Bones appear what color on X-ray?

White.

Air appears what color on X-ray?

Black.

Soft tissue appears what color on X-ray?

Gray.

Ultrasound uses what?

High-frequency sound waves.

Ultrasound is ideal for imaging what?

Gallbladder, pregnancy, tendons, blood flow, pediatric hips.

Adult brain bleeds are best evaluated with?

CT.

PET evaluates what?

Metabolic activity.

PET commonly used for?

Cancer staging and treatment response.

PET tracer commonly used?

FDG.

What does FDG measure?

Glucose metabolism.

Interventional radiology uses what approach?

Minimally invasive image-guided procedures.

Primary job of a radiologist?

Interpret medical imaging.

Primary role of fluoroscopy?

Real-time X-ray imaging.

Examples of fluoroscopy?

Barium swallow, cardiac catheterization.

Children are more sensitive to radiation because?

Higher cell division and longer lifespan.

Pregnant patients should minimize exposure to?

Ionizing radiation.

Low back pain + bladder dysfunction + leg weakness suggests?

Cauda equina syndrome.

Best imaging for cauda equina syndrome?

Emergent MRI.

Rotator cuff tear best imaged with?

MRI.

Suspected fracture first-line imaging?

X-ray.

Gallbladder disease first-line imaging?

Ultrasound.

Metastatic cancer response monitored with?

PET.

Histology determines what after biopsy?

Benign vs malignant tissue.

Which imaging does NOT confirm concussion?

MRI or CT; concussion is a clinical diagnosis.