Richard Lundeen

  • Citations Per Year
Learn More
This updated self-assessment exercise for the dental team by the Radiology Practice Committee of the American Academy of Oral and Maxillofacial Radiology is intended to produce the highest quality diagnostic radiographs while keeping patient exposure as low as is reasonably achievable. To continue to provide the best radiographic services to patients, those(More)
It has been stated that the key to prevention of oral cancer is to avoid the "five Ss: smoking, spirits, spices, sepsis, and syphilis." There is certainly enough evidence to add another "S"--sunlight. Although there is a paucity of information in the dental literature on the use of sunscreens, the following dermatologic recommendation is noteworthy:(More)
Noma, or cancrum oris, has been described as a gangrenous infection of the soft and hard tissues of the oronasal region. Prior to the advent of antibiotics the disease was commonly fatal. Now many survive the acute phase of the disease and present the surgeon with formidable problems of repair. This is a report of a presumed case of noma that resulted in(More)
The diagnostic challenge will always be present when encountering an ill-defined radiolucency. Is it an artifact, normal anatomy, or one of these inflammatory, proliferative, or neoplastic disorders? If it cannot be explained as an artifact or anatomic variant, then consideration certainly should be given for a short-term follow-up radiograph or immediate(More)
Research in parallel database (DB) and data mining (DM) algorithms has experienced a significant growth due to advancements in high performance computing (HPC) systems. Enabling technologies such as multi-core processors, object-based storage and high-bandwidth interconnects helped propel innovations to address fast increasing demands in scientific and(More)
This laboratory study compared five imaging systems for their diagnostic accuracy in detection of proximal surface dental caries. Ten viewers provided data on radiographic detectability of carious lesions. The diagnostic accuracy of each system was determined with receiver operating characteristic (ROC) curves by comparing viewer data with the true state of(More)
Panoramic radiographs were taken of a tissue-equivalent phantom to evaluate T-Mat G and Ortho G films in combination with rare earth screens. The radiographs were compared to radiographs made with high-speed calcium tungstate screens and Kodak XRP film. The reduction in the amount of radiation necessary for the use of rare earth screens (50% to 70%) was(More)
A series of radiographs of a tissue-equivalent phantom was taken in order to arrive at satisfactory radiographic techniques for the use of rare earth screens with the Panorex II. The radiation reduction needed for use of the rare earth screens was made with various filters. There was a 40% to 60% reduction in patient exposure for all of the rare earth(More)