ALU 101 2024/2025 Exam Questions with
100% Correct Answers | Latest Update
Hounsfield Units - ✔✔How the absorption of different tissues is quantified
Fluoroscopy - ✔✔allows physician to view moving parts of the body in real
time (used for arthroscopy, cardiac catheterization, stent placement)
Fine Needle Aspirate (FNA) - ✔✔obtains cells and/or fluid for pathological
dx
differentiates whether a cold nodule is benign/malignant
A-Mode, B-Mode, M-Mode & Grayscale - ✔✔provides info on structural
size, motion or both
creates moving image of heart including valve motion and wall motion
Contrast Agents - ✔✔allows better imaging for tubular/hollow structures
can be used w/ plain x-ray, CT & MRI studies
Doppler Ultrasonography - ✔✔measures velocity & direction of blood flow
within heart and blood vessels
1
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,evaluates venous insufficiency, blood clots, arterial occlusion/stenosis, and
identifies valvular disorders
X-Rays - ✔✔a beam of radiation is emitted and scattered/absorbed by
different tissues (i.e. bone, fat, water, and air)
Advantages of US over MRI/CT Scanning - ✔✔1. differentiates solid from
liquid
2. lower cost
3. portability
4. accessibility
5. no exposure from ionizing radiation
Hyperechoic, Hypoechoic, Anechoic Tissues - ✔✔1. large number of
soundwaves
2. low number of soundwaves
3. no soundwaves (fluid)
Limitations to US - ✔✔1. skill level of ultrasonographer
2. image resolution
3. "noise" produced when ultrasound waves hit gas & bone
2
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, Nuclear Medicine - ✔✔1. uses scintigraphy (gamma camera) to record
radioactive material in target orgain
2. images bone
3. determines thyroid and hepatobiliary function
3. can help dx CAD and view cardiac physiology
Digital Radiography - ✔✔1. Form of x-ray
2. emits low dose of radiation
3. allows radiologist to manipulate images for better visualization
Computed Tomography (CT/CAT) - ✔✔1. sees fat, air, soft tissue & bone
Oral/Instilled Contrast Agents w/ CT - ✔✔1. useful for intracranial, neck,
abdominal, pelvic & lung images
2. detects pulmonary embolism, aortic aneurysm/dissection or acute
hemorrhage
3. defines size, precise location & extent of tumor's involvement w/
surrounding tissue
Electron Beam CT (EBCT) - ✔✔produces images of coronary arteries
despite motion of heart to help dx CAD
3
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
100% Correct Answers | Latest Update
Hounsfield Units - ✔✔How the absorption of different tissues is quantified
Fluoroscopy - ✔✔allows physician to view moving parts of the body in real
time (used for arthroscopy, cardiac catheterization, stent placement)
Fine Needle Aspirate (FNA) - ✔✔obtains cells and/or fluid for pathological
dx
differentiates whether a cold nodule is benign/malignant
A-Mode, B-Mode, M-Mode & Grayscale - ✔✔provides info on structural
size, motion or both
creates moving image of heart including valve motion and wall motion
Contrast Agents - ✔✔allows better imaging for tubular/hollow structures
can be used w/ plain x-ray, CT & MRI studies
Doppler Ultrasonography - ✔✔measures velocity & direction of blood flow
within heart and blood vessels
1
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
,evaluates venous insufficiency, blood clots, arterial occlusion/stenosis, and
identifies valvular disorders
X-Rays - ✔✔a beam of radiation is emitted and scattered/absorbed by
different tissues (i.e. bone, fat, water, and air)
Advantages of US over MRI/CT Scanning - ✔✔1. differentiates solid from
liquid
2. lower cost
3. portability
4. accessibility
5. no exposure from ionizing radiation
Hyperechoic, Hypoechoic, Anechoic Tissues - ✔✔1. large number of
soundwaves
2. low number of soundwaves
3. no soundwaves (fluid)
Limitations to US - ✔✔1. skill level of ultrasonographer
2. image resolution
3. "noise" produced when ultrasound waves hit gas & bone
2
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, Nuclear Medicine - ✔✔1. uses scintigraphy (gamma camera) to record
radioactive material in target orgain
2. images bone
3. determines thyroid and hepatobiliary function
3. can help dx CAD and view cardiac physiology
Digital Radiography - ✔✔1. Form of x-ray
2. emits low dose of radiation
3. allows radiologist to manipulate images for better visualization
Computed Tomography (CT/CAT) - ✔✔1. sees fat, air, soft tissue & bone
Oral/Instilled Contrast Agents w/ CT - ✔✔1. useful for intracranial, neck,
abdominal, pelvic & lung images
2. detects pulmonary embolism, aortic aneurysm/dissection or acute
hemorrhage
3. defines size, precise location & extent of tumor's involvement w/
surrounding tissue
Electron Beam CT (EBCT) - ✔✔produces images of coronary arteries
despite motion of heart to help dx CAD
3
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
