Molybdenum breakdown limit for technetium at time of administration mnemonic

See video here https://youtube.com/shorts/kCyJ_AYLQcM

Regadenoson mnemonic for Nuclear Cardiology boards

Dipyridamole mnemonic for Nuclear Cardiology boards

PET crystals

https://youtube.com/shorts/KrYSxeF0CqA?si=LdTNJd2aJc4FK0mc

LSO/LYSO has small decay time

Allows for improved coincidence timing

Deterministic vs Stochastic effects

Deterministic effects (or tissue reactions) of ionizing radiation are related directly to the absorbed radiation dose and the severity of the effect increases as the dose increases. 

Example: Cataracts

Mnemonic: DDD Deterministic severity Determined by Dose

Stochastic effects of ionizing radiation are chance events, with the probability of the effect increasing with dose, but the severity of the effect is independent of the dose received. Stochastic effects are assumed to have no threshold. 

Example: Cancer

Mnemonic:
Stochastic Severity No
Probability So

Photolectric effect and Compton scatter

In the Compton effect, a photon interacts with an outer shell electron, resulting in the ejection of the electron and a scattered photon with reduced energy.

Compton scatter is a significant contributor to image noise. It can result in scattered photons reaching the detector and degrading image contrast.

Compton scatter is more likely to occur with higher-energy photons, such as those around 140 keV.

The photoelectric effect is more pronounced at lower energies and is characterized by the complete absorption of a photon by an inner-shell electron, leading to the ejection of the electron.

The Photoelectric Effect is particularly important in medical imaging applications using low-energy X-rays, where it contributes to contrast in radiographic images. 

Mnemonic: Compton is with COmpletely More energy PhoTONs  (Compton scatter is more likely to occur with higher-energy photon)

photoeLEctric absorbs aLL Lower Energies 

Inaccurate camera settings, incorrect photopeak, flood field

Inaccurate camera settings, incorrect photopeak, flood field for nuclear boards

The pulse height analyzer (PHA) measures in-coming signals and enables signals of a specific energy range ("window") to be recorded while excluding all other signals.

If the window set slightly below the photopeak, the honey comb artifact with "hot" spots over each photomultiplier tube is characteristic.

BGO mnemonic for nuclear medicine boards

See YouTube video here https://youtu.be/JTpj76zUS0I?si=zNhY9zkG3_55XVU1 

Tracer uptake and coronary blood flow mnemonic for Nuclear Cardiology boards

 

Radiation safety in pregnancy

United States Nuclear Regulation Commission (USNRC) also recommends total fetus exposure during pregnancy to be less than 5.0 mSv (500 mrem). The fetus radiation dose below 50 mGy is considered safe and not cause any harm.

See YouTube video https://youtu.be/ajPn17iT0aE?si=2Uz1dZIwfpoIeRjM

Half life of Fluorine 18 is 110 minutes mnemonic

 

1 mCi = 37 MBq mnemonic for nuclear boards

Threshold for surgical repair of thoracic aortic aneurysm in patients with Marfan syndrome mnemonic

What is the threshold for surgical repair of thoracic aortic aneurysm in patients with Marfan syndrome? 

5 cm

Marfan, MarFIVE

The threshold for surgical repair in patients with Marfan syndrome is an external diameter of 5 cm. Factors that will prompt repair at a diameter <5 cm include rapid growth of >0.5 cm in 1 year, family history of aortic dissection at a diameter <5 cm, or the presence of significant aortic regurgitation.

Transposition of the Great Arteries: D-TGA & L-TGA (congenitally corrected TGA) mnemonic

Here's a mnemonic I made:

D the arteries. 

And L flipped 45 degrees counter clock wise looks like a V for ventricles so ventricles are transpositioned. Ventricles also have C that reminds me it's congenitally corrected. 

That's all! 

Read more: Transpositioned of great arteries by Medha

-IkaN (Nakeya Dewaswala) 

Soluble Guanylate Cyclase Stimulators notes and mnemonic

Low voltage criteria on ECG mnemonic

Entire amplitude of the QRS (R + S wave) must be < 5mm in all limb leads or < 10mm in all precordial leads. How do I remember this? Mnemonic!​

- IkaN (Nakeya Dewaswala)

Triad of hypocalcemia mnemonic and illustration

Shreya HA

MEN syndrome: trick to remember chromosomes

Shreya HA

Atropine dose for bradycardia (ACLS) mnemonic

It's 1 mg. 

-IkaN (Nakeya Dewaswala) 

GLUT-4 mnemonic and illustration

GLUT-4 functions for the insulin-dependent translocation of glucose.

Shreya HA