Imaging in Gynaecology Flashcards
before performing a scan what is recommended
brief examination of the abdomen
what are some disadvantages of transabdominal ultrasound
difficult in obese patients and in patients with gaseous distension of the bowl
operator dependent
difficult to produce same images each time so cant be use to assess cancer treatment response
describe the difference in wavelength and frequency of transvaginal ultrasound
higher frequency ultrasound but shorter wavelength
what does the higher frequency in transvaginal ultrasound mean clinically
the transducer has to be closer to target organ as the increase in frequencies more likely to be scattered in the body
in terms of bladder what should it be for transabdominal ultrasound
full
should bladder be full or empty for transvaginal ultrasound
empty
if doing ultrasound which would you do first trasabdo or transvaginal
transabdominal
if not sexually active would you do transvaginal
no
what is second line investigation after ultrasound for acute abdo pain
CT scan
when is CT particularly useful
in staging of gynae malignancy especaially ovarian and endometrial cancers
how many CXR is CT scan equivalent to
160
what energy is MR
radiofrequenct
what organ is MR really not good for
lung
when is MR contraindicated
pacemaker, artificial metallic heart valve, nerve stimulators, cochlear implants
what scan is best for cervical cancer
MR
what type of MRI is good for cervical cancer
T2 weighted
what type of uterine pathology is MR good at looking at
fibroids
what investigation helps diagnose endometriosis
MRI (but may be subclinical so can use diagnostic laparotomy)
what does altered blood look like on T1
white
what does altered blood look like on T2
grey
what is first line investigation for endometrial cancer
Trasvaginal ultrasound
what can be used to establish degree of myometrial invasion in suspected endometrial carcinoma
MRI
what is the difficulty of endometrial cancer patients getting an MRI scan
many with endometrial cancer are obese
