Nuclear Medicine

The parent–daughter pair in the standard 99Mo/99mTc generator is:

The principal photon energy of 99mTc is:

The appropriate collimator for I-131 imaging is:

For In-111 (171 & 245 keV) imaging, the preferred collimator is:

The daily QC test for a dose calibrator is:

A typical daily gamma camera QC is:

The USP limit for aluminum breakthrough in 99mTc eluate is:

The regulatory limit for 99Mo breakthrough at time of administration is approximately:

FDG PET detects which photons?

The physical half-life of 18F is about:

Patient preparation for FDG PET most importantly includes:

A frequent cause of intense physiologic FDG uptake in bowel is:

FDG uptake in brown fat is reduced by:

The most common bone scintigraphy radiopharmaceutical is:

Three-phase bone scan is most useful for suspected:

A “super scan” on bone scintigraphy shows:

The preferred test for Meckel diverticulum is:

HIDA (hepatobiliary) studies use which tracer?

In suspected acute cholecystitis on HIDA, nonvisualization of the gallbladder with patent common bile duct suggests:

For diuretic renography to assess obstruction, the tracer most often used is:

ACE-inhibitor renography (captopril test) helps identify:

Preferred radioiodine for thyroid uptake/scan (diagnostic) is:

Breastfeeding and radioiodine therapy (I-131) requires:

The appropriate collimator for thyroid imaging with 99mTc or I-123 is generally:

A common SPECT QC phantom for resolution/contrast is the:

PET “randoms” are best reduced by:

PET attenuation correction uses:

Misregistration between PET and CT most often causes:

SUV in PET is defined as:

A known cause of spuriously low tumor SUV is:

The principal photon energy of Tl-201 imaging is:

Labeled-RBC GI bleed studies are advantageous because they:

Sentinel lymph node mapping typically uses:

A classic artifact from PMT failure on a flood is:

Generator elution best practice is to:

A classic V/Q finding highly suggestive of PE is:

82Rb for PET myocardial perfusion is produced by:

13N-ammonia for PET has which property?

Pharmacologic stress agents contraindicated in severe asthma/COPD include:

Gated SPECT MPI typically divides each cardiac cycle into:

The primary physical principle enabling SPECT is:

A classic star artifact centered over a very hot focus on planar 131I imaging is mainly due to:

Partial volume effect in PET/SPECT most strongly causes:

Time-of-flight (TOF) PET improves image quality by:

Resolution recovery (PSF modeling) in PET primarily:

Which preparation reduces interfering physiologic uptake for I-123/I-131 MIBG imaging?

A classic indication for 99mTc-sestamibi parathyroid imaging is:

Dual-tracer parathyroid protocol commonly pairs:

For thyroid uptake testing, interfering factor that lowers uptake is:

On radioiodine scan, Graves disease typically shows:

Subacute (de Quervain) thyroiditis most often shows:

Classic labeled-RBC hepatic hemangioma scan demonstrates:

A HIDA study with persistent common bile duct/bowel activity but nonvisualized gallbladder after morphine suggests:

The minimum bleeding rate to detect active GI hemorrhage with labeled-RBC scintigraphy can be as low as:

In diuretic renography, a T½ after furosemide >20–30 minutes with a rising curve most suggests:

A MAG3 renogram in renal artery stenosis after ACE inhibitor typically shows:

Renal split function on MAG3 is calculated from:

For suspected osteomyelitis in a diabetic foot with hardware, the preferred study is often:

The principal photon energy of Ga-67 is:

In ventilation–perfusion scanning, common ventilation agents include:

A matched large ventilation and perfusion defect with corresponding chest X-ray opacity suggests:

FDG uptake patterns—what reduces myocardial uptake for oncologic PET?

Physiologic sites of high 68Ga/18F-PSMA uptake include:

68Ga-DOTATATE PET is most specific for:

Cardiac amyloidosis evaluation with bone-avid tracers uses:

For Lu-177 DOTATATE therapy, the most common dose-limiting toxicity is:

A common early side effect after high-dose radioiodine (I-131) therapy is:

Key radiation safety instruction after I-131 ablation includes:

Which best explains attenuation correction (AC) “hot” liver artifact on PET/CT with IV contrast?

Misregistration between PET and CT from breathing differences commonly causes:

Dose calibrator linearity testing verifies:

99mTc generator eluate quality control includes testing for:

In PET quantification, SUL (lean body mass–normalized SUV) is preferred over SUVbw when:

For brain FDG PET in epilepsy, the interictal focus typically shows:

White-cell labeling: In-111-oxine vs 99mTc-HMPAO—key difference?

Neuroendocrine tumor imaging—physiologic uptake that can mimic disease on DOTATATE PET includes:

For pediatric renal cortical imaging of scarring, the preferred tracer is:

Gastric emptying solid-meal study abnormality is typically defined as:

Biliary atresia scintigraphy in infants often includes pretreatment with:

The primary contraindication for radionuclide therapy (e.g., I-131, Lu-177) is:

In a 99Mo/99mTc generator, transient equilibrium between parent and daughter is reached in about:

The wipe test for room/bench contamination is reported in:

Which QC confirms a gamma camera is correctly energy-peaked before the daily flood?

The MIRD schema estimates organ dose using:

For FDG PET, which factor most increases measured SUV in a tumor (all else equal)?

Myocardial perfusion SPECT in left bundle branch block is best performed with:

Balanced ischemia on SPECT most likely appears as:

Transient ischemic dilation (TID) suggests:

99mTc-MAG3 vs 99mTc-DTPA—key difference?

In HIDA, morphine is used to:

I-123 ioflupane (DATscan) primarily evaluates:

A classic cause of false-positive bone scan hot spots at costochondral junctions is:

“Flare phenomenon” on follow-up bone scans after therapy indicates:

153Sm-EDTMP vs 223Ra for bone pain palliation—true statement:

Y-90 radioembolization: glass vs resin microspheres key difference?

In 177Lu-DOTATATE therapy, renal protection commonly uses:

For 177Lu-PSMA therapy eligibility, tumors should demonstrate:

After high-dose I-131 therapy, which measure best reduces sialadenitis risk?

In PET/CT, raising the lower energy discriminator (narrower window) primarily:

A cold thyroid nodule on I-123 uptake/scan is MOST concerning when:

On RBC GI bleed scintigraphy, tracer activity that moves antegrade/retrograde along bowel loops indicates:

For PET/CT respiratory motion, the best single mitigation is:

The appropriate collimator for Tl-201 cardiac planar/SPECT is:

A dose calibrator geometry dependence test evaluates:

Indium-111 pentetreotide (Octreoscan) imaging shows physiologic uptake in:

For Meckel scan, premedication that increases sensitivity is:

Which artifact on PET appears as skin “hot rings” from extravasated tracer?

For SPECT center-of-rotation (COR) error, the typical manifest image artifact is: