Optical versus Radiographic Magnification for Fine-detail Skeletal Radiography

Stomach and duodenum: radiographic magnification using computed radiography (CR).

We performed direct radiographic magnification (X3) using a 0.1-mm microfocal tube and computed radiography (CR) in air-barium double-contrast studies of the stomach and duodenum. To eliminate blurring of the image due to motion, we used the maximum kilovolt peak rate possible (102 kVp), the maximum milliampere second rate possible (64 mAs), the shortest possible exposure time (0.1 second), and...

When Is Fine Phonetic Detail a Detail?

It is our task to take a discussant role in the special session “Sound to Sense: Modelling Fine Phonetic Detail” at ICPhS 2007. The contributions by Moore and Maier [12] and Lecumberri and Cooke [11] inspire further thinking on how fine phonetic details can be successfully explored by humans or by machines. The MINERVA2 system built on the multi-trace (episodic) memory model challenges current ...

Evaluation of Image Magnification in Digital Panoramic Radiography

Introdouction: The aim of the present study was to investigate image magnification in digital panoramic radiography and assess the effect of anatomical sites on the magnification in both males and females. Materials and methods: In this retrospective study, digital panoramic radiographs of 48 patients with 202 implants were investigated. Implant diameter and length were measured on pan...

Optical magnification for subnormal vision: historical survey.

Early attempts to provide optical magnification to compensate for subnormal visual acuity used small galilean telescopes, mounted in spectacle frames, giving magnifications ranging from 1.3 to 3 ~ . They were seldom helpful in distance vision because of the restricted field, change of apparent distance, and inadequate magnification. Many used them only for reading, and obtained additional magni...

Radiographic Contrast-Enhancement Masks in Digital Radiography