Cellulose as a gastrointestinal US contrast agent.

Area of Science:

• Medical Imaging
• Gastroenterology
• Biomaterials

Background:

• Abdominal ultrasound (US) imaging quality is frequently degraded by artifacts caused by adjacent bowel gas.
• Reducing these artifacts is crucial for accurate diagnosis and assessment of abdominal organs.

Purpose of the Study:

• To evaluate cellulose preparations as gastrointestinal (GI) US contrast agents for improving abdominal US image quality.
• To assess the efficacy of these agents in reducing bowel gas artifacts and enhancing visualization of abdominal anatomy.

Main Methods:

• Cellulose preparations were assessed for homogeneity and reflectivity in phantom solutions.
• Two selected agents were administered orally to ten volunteers, who underwent abdominal US imaging before and after administration.
• Images were evaluated by five radiologists for bowel marking, anatomical visualization, and gas artifact degradation.

Main Results:

• The orally administered US contrast agents significantly improved visualization of bowel and abdominal anatomy compared to degassed water.
• A notable reduction in image degradation caused by bowel gas was observed after contrast agent administration.
• The selected cellulose preparations demonstrated optimal homogeneity and reflectivity for US imaging.

Conclusions:

• Cellulose-based gastrointestinal US contrast agents are effective in mitigating bowel gas artifacts.
• These agents enhance the diagnostic quality of abdominal US imaging by improving visualization of anatomical structures.
• Cellulose preparations represent a promising approach to overcoming limitations in abdominal US examinations.