Rationale and Values for different body tissues and materials - The chosen standards for the Hounsfield scale are universally available references and suited for computed axial tomography (CT). - CT was developed for imaging the internal anatomy of living creatures, based on organised water structures. - Values on the Hounsfield scale: - CT scan window level set to -700 HU represents lung tissue. - CT scan window level set to -1,000 HU represents air. - CT scan window level set to 0 HU represents water. - CT scan window level set to 60 HU represents liver tissue. - Hounsfield Unit (HU) differentiation applies to medical-grade dual-energy CT scans, not cone beam computed tomography (CBCT) scans.

References - 'Diagnostic radiology physics: a handbook for teachers and students' by International Atomic Energy Agency. - 'Radiation oncology physics: a handbook for teachers and students' by International Atomic Energy Agency. - 'AAPM Report No. 233: Performance Evaluation of Computed Tomography Systems - The Report of AAPM Task Group 233' by American Association of Physicists in Medicine. - 'Cone-beam computerised tomography (CBCT) imaging of the oral and maxillofacial region: A systematic review of the literature' in the International Journal of Oral and Maxillofacial Surgery. - 'Prostatic Diseases' by Herbert Lepor.

Applications - Hounsfield Unit (HU) values can be used for the evaluation of tumors. - A radiodensity of less than 10 HU in an adrenal tumor indicates a benign adrenal adenoma. - Contrast agents can modify HU in some body parts, mainly blood. - CT acquisition and reconstruction parameters can cause variations in HU values. - CBCT scans provide unreliable HU readings.

External links - Hounsfield unit - Medcyclopaedia - GE (Archived from the original on 2012-04-04) - Hounsfield Unit - fpnotebook.com - Introduction to CT physics (PDF) (Archived from the original (PDF) on 2007-09-26)

Hounsfield scale, Hounsfield unit, Medcyclopaedia, GE - The Hounsfield scale measures radiodensity and represents tissue attenuation. - The Hounsfield unit quantifies CT image pixel values and represents tissue density. - Water has a value of 0 on the Hounsfield scale, air has a value of -1000, and bone has a value of +1000. - Medcyclopaedia is an online medical encyclopedia that provides information on various medical topics, including the Hounsfield scale. - GE is a global conglomerate involved in various industries, including healthcare, and offers CT scanners with advanced features.