A retrospective consecutive case analysis of pre-treatment and comparative static radiological parameters following chiropractic adjustments

Abstract: An investigation was undertaken to determine the effect of chiropractic adjustments on static radiological parameters. Standard plain film radiography was used. A retrospective consecutive case analysis approach was used for obtaining the data from the pretreatment and comparative posttreatment radiographs. Measurements for cervical lordosis, sacral base angle, lumbar lordosis, scapular angle, Cobb’s angle and… Continue Reading »

Biomechanical analysis by chiropractic radiography: Part 1. A simple method for determining x-ray projectional distortion

Part 1. A simple method for determining x-ray projectional distortion Abstract: Projectional distortion is known to produce artifactual disrelationships between the images of osseous segments on X-ray film. Apparatus and methods were developed to measure the effect of projectional distortion on a human third lumbar vertebra. The procedures for mathematical analysis of such distortion are… Continue Reading »

Biomechanical analysis by chiropractic radiography: Part II

Part II. Effects of x-ray projectional distortion on apparent vertebral rotation Abstract: Projectional distortion in an X-ray image can produce artifacts that cause error in the measurement of vertebral rotation. By means of a stereotaxic positioning device, the effect of varying object-film distance, vertical and horizontal off-centering, rotation, and lateral flexion on the amount of… Continue Reading »

Biomechanical analysis by chiropractic radiography: Part III

Biomechanical analysis by chiropractic radiography: Part III. Lack of effect of projectional distortion on Gonstead vertebral end plate lines Abstract: Projectional distortion is known to produce artifactual dysrelationships between images of osseous segments on X-ray films. According to Gonstead, lines constructed parallel to the adjacent vertebral end plates will converge if a lateral flexion malposition… Continue Reading »

Computer modeling of selected projectional factors of the 84-in focal film distance anteroposterior full spine radiograph compared with 40-in focal film distance sectional views

Abstract Objective: The purpose of this study was to compare the 84-in focal film distance anteroposterior (A-P) full spine view to selected sectional views taken at a 40-in focal film distance for angles of divergence and changes produced by lateral translation and variation in source object distance. Methods: Computer models were used to determine angles… Continue Reading »

Consistency and accuracy of roentgenograms for measuring sagittal translation in the lumbar vertebral motion segment: an experimental model

Abstract: An experimental model of the L4-L5 lumbar motion segment was developed that allowed precise manipulation of sagittal translation, rotation of L5 relative to L4, tilt of L4 on L5, and control of roentgenogram quality (image clarity) by placing a water bath between the tube and the vertebral body. A series of experiments were designed… Continue Reading »

Inter- and intraexaminer agreement using Gonstead line marking methods

Abstract: This study examined the question, “To what degree do two experienced chiropractors agree, as to level of subluxation, using Gonstead line-marking methods?” X-rays were submitted to two examiners who were asked to analyze films according to the Gonstead line-marking system. Degree of agreement regarding subluxations detected was compared with respect to level and direction.… Continue Reading »

Radiographic Line Marking: Examiner Reliability, positioning reliability, validity and outcome measurement issues

Plaugher G, Cremata EE, Phillips RB. A retrospective consecutive case analysis of pre-treatment and comparative static radiological parameters following chiropractic adjustments. J Manipulative Physiol Ther 1990; 13:498-506. (Authors’ rsrchtitle) Plaugher G, Cremata EE, Phillips RB. Letter to the editor; In Reply J Manipulative Physiol Ther 1991; 14:335-336. Plaugher G, Cremata EE, Phillips RB. Letter to… Continue Reading »

Role of plain film radiography in chiropractic clinical practice

Abstract: Since their simultaneous discoveries in 1895, the disciplines of chiropractic and roentgenology have been linked in many of their applications and technological advancements. The integral component of X-ray analysis in clinical practice is important for a variety of reasons. Should bone weakening diseases be present, then the applied forces of an adjustment/manipulation could potentially… Continue Reading »

The inter-and intraexaminer reliability of the Gonstead pelvic marking system

Abstract: An investigation was undertaken to determine the inter- and intraexaminer reliability of the Gonstead pelvic radiographic marking system. This methodology analyzes the relative dimensions and spatial positions of the two innominate bones and sacrum and measures leg length inequality through an evaluation of femur head height. Two examiners marked 71 full spine radiographs twice… Continue Reading »

The reliability of patient positioning for evaluating static radiologic parameters of the human pelvis

Abstract: Objective: To determine the reproducibility of patient positioning on radiographically evaluated static configurations of the human pelvis. Design: Repeat anteroposterior radiography of the human pelvis was performed in vivo. Comparative examinations were performed after 1 hour in one subject pool. A second sample underwent repeat examination after a mean of 18 days Setting: Outpatient… Continue Reading »