what is the frequency used in transvaginal scanning
5-7.5HZ(5-10HZ)
In transabdominal scanning 3-5hz is used
What is the SI unit of radioactive decay?
Bequerel
SI unit for the radiotive dose absorbed is Gray and
Sievert (Sv) measures the biological effect of radiation exposure on tissues.
What is ALARA stands for
As low as reasonably possible
Which ultrasound (USG) resolution type offers the best image clarity?
axial
Which of the following is the primary purpose of using ultrasound gel during scanning?
to eliminate air between probe and skin
Which type of atom is primarily used in MRI imaging due to its abundance and magnetic properties in the human body?
hydrogen atom
What is the best type of transabdominal ultrasound probe used in an obese woman?
low frequency curvilinear probe
Which drug is implicated in causing kernicterus in neonates?
sulphonamide
What is the main physical principle behind magnetic resonance imaging (MRI)?
MRI relies on radiofrequency pulses that realign hydrogen protons within a magnetic field to produce detailed images of soft tissues.
which ultrasound modes is most appropriate for assessing fetal heart rate
m mode
What is the primary reason lead is used for radiation shielding in diagnostic imaging
high atomic number and density
what is the MOA of hydralazine
direct action of the arteriolar vasdilation
what is the frequency of the linear probe
7-15 Hz
Which component of an X-ray tube is responsible for producing the X-ray beam
anode
Which unit is used to measure the radioactivity of a substance?
bequerel
It’s important to differentiate radioactivity (Bq), radiation dose absorbed (Gy), and biological effect (Sv)
Which type of Doppler ultrasound is best suited for measuring blood flow velocity in large fetal vessels?
pulse wave doppler
When is the optimal time to perform a hysterosalpingogram (HSG)?
between day 6 to 12 of the menstrua cycle
how Doppler ultrasound estimates blood flow?
by analyzing the frequency shift that occurs when sound waves reflect off moving red blood cells.
In transvaginal ultrasound, which structure is typically used as a landmark to assess the position and angle of the uterus?
bladder
In diagnostic ultrasound, the speed of sound is assumed to be constant through soft tissues. What is this average speed?
1540m/s
frequency used in diathermy
500hz
With regard to MRI scanning what is the SI unit measure of magnetic flux?
weber
SI unit of diathermy power?
watts
initial assessment of patients with urinary incontinence?
post void bladder volume
Bladder diary
