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Keywords:
Outcomes, Diagnostic procedure, Normal variants, Nuclear medicine conventional, Gastrointestinal tract, Quality assurance
Authors:
V. M. Rhodes, N. Moffitt, T. Toma; SOUTHEND ON SEA/ESSEX/UK
DOI:
10.1594/ecr2016/C-1199
Methods and materials
Study cohort and exclusion criteria.
The study group consisted of unselected consecutive patients who had undergone a SeHCAT scan between 30th Sept 2013 and 30th Sept 2015.
A retrospective review was then undertaken of the patient records. Patients were rejected before this review if they had not yet completed the SeHCAT test.
Four patients were also later rejected during the review as we were unable to acquire their patient files for review.
The level of diarrhoea was determined from a review of patient files and from the referral for a SeHCAT scan for patients who had complained of diarrhoea up to 4 weeks prior to having a SeHCAT test.
Scanning procedure
All SeHCAT scan data was acquired on a Symbia S dual headed gamma camera using a standardised protocol with a scan speed of 10cm/min for a scan length of 79cm and a matrix size of 256x512cm.
All SeHCAT’s were acquired with the LEHR collimators fitted as per the local scanning routine.
The patients were fasted for at least 1 hour prior to administration of the SeHCAT capsule.
A 370KBq capsule of SeHCAT was then administered orally at day 1.
The patient continued fasting and had their first scan 3 hours after the capsule administration for 10 min.
Once the patient had vacated the department a 10 min background scan was then also conducted.
The scans were then repeated 7 days later at the same time of day,
with care to ensure that the patient positioning is as consistent as possible between scans.
Some drugs can interfere with the accuracy of the SeHCAT results such as Colesevelam Hydrochloride,
Colestyramine and Colestipol hydrochloride.
For routine scanning these patients are requested to stop taking these medications for the full 7 days of the test under the guidance of their doctor.