Related Experiment Video
Updated: Jan 21, 2026
06:10
Extrahepatic Bile Duct and Gall Bladder Dissection in Nine-Day-Old Mouse Neonates
Published on: August 23, 2022
2.4K
Evaluation of Gall Bladder Stones Using Susceptibility Weighted Imaging
Rakesh Kumar Gupta1, Jaladhar Neelavalli2, Mamta Gupta1
1From the Department of Radiology, Fortis Memorial Research Institute, Gurgaon.
Journal of Computer Assisted Tomography
|July 30, 2019
Summary
Susceptibility-weighted imaging (SWI) effectively visualizes gallbladder stones, offering a valuable addition to routine magnetic resonance imaging protocols for improved detection and evaluation.
Area of Science:
- Radiology
- Medical Imaging
- Gastroenterology
Background:
- Gallbladder stones (cholelithiasis) are common and can cause significant morbidity.
- Accurate visualization of gallstones is crucial for diagnosis and treatment planning.
Purpose of the Study:
- To assess the efficacy of susceptibility-weighted imaging (SWI) in visualizing gallbladder stones.
- To determine the potential role of SWI as an adjunct to standard magnetic resonance imaging (MRI) protocols.
Main Methods:
- Retrospective review of imaging data from 47 patients undergoing cholecystectomy.
- Inclusion of breath-hold SWI in the MRI protocol to analyze gallstone visualization.
- Characterization of gallstone phase signature (diamagnetic, paramagnetic, or mixed) and ex vivo magnetic susceptibility measurements.
Main Results:
- Gallstones were surgically confirmed in 45 out of 47 patients.
- SWI successfully visualized gallstones in 43 cases, including one case missed by routine imaging.
- Phase signatures identified included diamagnetic (29), paramagnetic (7), and mixed (9) types, with corresponding ex vivo susceptibility values.
Conclusions:
- SWI demonstrates high efficacy in visualizing gallbladder stones.
- SWI can be integrated into routine MRI protocols to enhance the evaluation of cholelithiasis.
Related Concept Videos
01:30Types of Building Stone
404
Building stones, essential materials for construction, are extracted from natural rock deposits and processed into specific forms and dimensions suitable for various building applications. These stones are broadly classified into three types based on their geological formation: igneous, sedimentary, and metamorphic.
Igneous rocks are formed from the solidification of magma or lava. An example is granite, known for its durability and resistance to weathering, making it ideal for parts of...
Igneous rocks are formed from the solidification of magma or lava. An example is granite, known for its durability and resistance to weathering, making it ideal for parts of...
404
01:15Quarrying of Stone
558
Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the...
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the...
558
01:29Stone Masonry
445
Stone masonry is a construction technique that uses individual stones to build structures and can be categorized into two main types: rubble and ashlar. Rubble masonry uses uneven, naturally shaped stones such as river rocks or fragments from quarries. This method often requires the mason to select and possibly shape each stone to fit the designated space, ensuring a proper build, even with irregular stone sizes and shapes. Ashlar masonry, on the other hand, employs uniformly cut stones that...
445
01:28Imaging Studies I: Kidney, Ureter, and Bladder Studies
291
Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...
291
00:57Weighted Mean
6.2K
While taking the arithmetic, geometric, or harmonic mean of a sample data set, equal importance is assigned to all the data points. However, all the values may not always be equally important in some data sets. An intrinsic bias might make it more important to give more weightage to specific values over others.
For example, consider the number of goals scored in the matches of a tournament. While computing the average number of goals scored in the tournament, it may be more important to...
For example, consider the number of goals scored in the matches of a tournament. While computing the average number of goals scored in the tournament, it may be more important to...
6.2K
01:23Urinary Bladder
3.2K
The urinary bladder is a hollow, muscular sac that temporarily stores urine before it is expelled from the body. It can hold approximately 600 mL of urine prior to micturition. The bladder is retroperitoneal and located behind the pubic symphysis in the pelvic floor.
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
3.2K