Related Experiment Video
Updated: Jul 12, 2026
13:35
Segmentation and Linear Measurement for Body Composition Analysis using Slice-O-Matic and Horos
Published on: March 21, 2021
JPEG 2000 compression of abdominal CT: difference in tolerance between thin- and thick-section images
Hyoun Sik Woo1, Kil Joong Kim, Tae Jung Kim
1Department of Radiology, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do, Seoul 463-707, Korea.
AJR. American Journal of Roentgenology
|August 24, 2007
Summary
Thin-section abdominal CT images tolerate Joint Photographic Experts Group (JPEG) 2000 compression less than thick-section images. Lower compression levels are recommended for thin-section abdominal CT to maintain image quality.
Area of Science:
- Medical Imaging
- Radiology
- Image Compression
Background:
- Joint Photographic Experts Group (JPEG) 2000 compression is widely used for medical images.
- Image compression's impact on diagnostic quality varies with image characteristics.
Purpose of the Study:
- To compare the compression tolerance of thin-section (0.67 mm) versus thick-section (5 mm) abdominal CT images using JPEG 2000 compression.
- To determine the visually lossless threshold for both thin and thick abdominal CT slices.
Main Methods:
- One hundred thin and thick abdominal CT image pairs were compressed at various levels (reversible, 6:1, 10:1, 15:1).
- Radiologists assessed image distinguishability from originals.
- Peak Signal-to-Noise Ratio (PSNR) and percentage of distinguishable pairs were analyzed.
- Visually lossless thresholds were estimated based on radiologist responses.
Main Results:
- Thin sections exhibited lower PSNR values across all compression levels compared to thick sections.
- Distinguishable artifacts appeared at lower compression ratios for thin sections (≥6:1) than for thick sections (10:1, 15:1).
- Visually lossless threshold for thin sections was below 6:1, while for thick sections it was between 6:1 and 10:1.
Conclusions:
- Thin-section abdominal CT images demonstrate reduced tolerance to JPEG 2000 compression.
- Lower compression ratios are necessary to achieve visually lossless compression for thin-section abdominal CT.
- Image quality considerations are critical when applying compression to high-resolution CT data.
Related Concept Videos
01:10Computed Tomography
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
01:27Imaging Studies III: Computed Tomography
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
01:30Radiological Investigation I: X-ray and CT
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...
01:17Ultrasonography
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
During an ultrasonography procedure, a handheld device called a...
01:28Imaging Studies for Cardiovascular System V: CT
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
01:14Imaging Studies I: CT and MRI
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...