Use of Iterative Reconstruction Method in Ultralow-dose CT for Follow-up of Patients With Intraabdominal Abscess: Comparison With Standard Dose CT

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT03681665

Enrollment

Registered

2018-09-24

Start date

2018-06-29

Completion date

2019-03-18

Last updated

2020-09-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Abdominal Abscess

Brief summary

Increasing radiation exposure by medical examinations is getting more concerns. For optimal medical imaging, reducing radiation exposure with preservation image quality is important. One of the solutions is use of iterative recontruction of CT examination. In this study, the investigators aimed to investigate the clinical feasibility of ultralow dose abdominopelvic CT with iterative reconstruction in patients with intraabdominal abscess. Patients with intrabdominal abscess usually undergo multiple CT examinations to evaluate treatment response. Therefore, ultralow dose CT can reduce unnecessary radiation exposure in these patients.

Interventions

OTHERultralow dose abdominopelvic CT

In the patient cohort with abdominal abscess, ultralow dose abdominopelvic CT will be performed as a follow-up protocol. Ultralow dose CT has approximately 80\ 90% reduced radiation dose compared to standard dose CT.

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

20 Years to 100 Years

Healthy volunteers

Inclusion criteria

1. patients who underwent standard dose CT for suspected intraabdominal abscess 2. patients who need follow-up CT to evaluate treatment response of abscess 3) Adult patient, 4) patients who agreed this study protocol

Exclusion criteria

1. pregnancy 2. patients with poor renal function (GFR \< 30 mL/min/1/73m2) 3. Patients who have allergy to CT contrast media 4. Patients who are not cooperative (e.g., dementia)

Design outcomes

Primary

Measure	Time frame	Description
Score of subjective image quality of CT image	1 month	Score of subjective image quality of CT images consists of overall subjective image quality, noise, diagnostic ability, and artifact.

Secondary

Measure	Time frame	Description
Effective radiation dose: CTDIvol(volume CT dose index), DLP(dose length product), effective dose(DLPx0.015)	1 month	Effective radiation dose between standard dose CT and ultra-low dose CT will be compared

Countries

South Korea

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026