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

Yonsei University20 enrolled

Overview

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.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Abdominal Abscess

Interventions

ultralow dose abdominopelvic CTOTHER

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.

Eligibility

Medical Language ↔ Plain English

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)

Outcomes

Primary Outcomes

Score of subjective image quality of CT image

Score of subjective image quality of CT images consists of overall subjective image quality, noise, diagnostic ability, and artifact.

Time frame: 1 month

Secondary Outcomes

Effective radiation dose: CTDIvol(volume CT dose index), DLP(dose length product), effective dose(DLPx0.015)

Effective radiation dose between standard dose CT and ultra-low dose CT will be compared