CDT CDT Phototherapy & Light-Based Treatments

Question 1

What wavelength range is used in narrowband UVB phototherapy?

Accepted Answer

UVB at 311–313 nm

Answer

UVA (320–400 nm)

Answer

UVC (200–280 nm)

Answer

Visible light (400–700 nm)

Question 2

Which condition is narrowband UVB phototherapy most commonly used to treat?

Accepted Answer

Psoriasis

Answer

Rosacea

Answer

Acne vulgaris

Answer

Seborrheic dermatitis

Question 3

What does PUVA phototherapy combine?

Accepted Answer

Psoralen + UVA light

Answer

Pulsed ultrasound + vitamin A

Answer

Pulsed UV + antifungal

Answer

Photodynamic agent + UVA

Question 4

What is the Minimal Erythema Dose (MED) used to determine in phototherapy?

Accepted Answer

Safe starting UV dose for treatment

Answer

Maximum safe topical steroid dose

Answer

Amount of psoralen to prescribe

Answer

Frequency of treatment sessions

Question 5

Which protective measure is mandatory during and after PUVA therapy?

Accepted Answer

UV-protective goggles during and for 24 hours after treatment

Answer

Full-body sunscreen only

Answer

Antibiotic prophylaxis

Answer

Topical corticosteroids before each session

Question 6

What is excimer laser therapy primarily used for in dermatology?

Accepted Answer

Localized psoriasis and vitiligo

Answer

Treating basal cell carcinoma

Answer

Acne extraction

Answer

Wart removal