Comparision of Different Methods of Area Measurement in Irregular Scar / 法医学杂志

OBJECTIVES@#To determine a measurement standard of irregular scar area by comparing the advantages and disadvantages of different measurement methods in measuring same irregular scar area.@*METHODS@#Irregular scar area was scanned by digital scanning and measured by coordinate reading method, AutoCAD pixel method, Photoshop lasso pixel method, Photoshop magic bar filled pixel method and Foxit PDF reading software, and some aspects of these methods such as measurement time, repeatability, whether could be recorded and whether could be traced were compared and analyzed.@*RESULTS@#There was no significant difference in the scar areas by the measurement methods above. However, there was statistical difference in the measurement time and repeatability by one or multi performers and only Foxit PDF reading software could be traced back.@*CONCLUSIONS@#The methods above can be used for measuring scar area, but each one has its advantages and disadvantages. It is necessary to develop new measurement software for forensic identification.

Comparision of Different Methods of Area Measurement in Irregular Scar / 法医学杂志

ObjectiveTo determine a measurement standard of irregular scar area by comparing the ad-vantages and disadvantages of different measurement methods in measuring same irregular scar area. MethodsIrregular scar area was scanned by digital scanning and measured by coordinate reading method, AutoCAD pixel method, Photoshop lasso pixel method, Photoshop magic bar filled pixel method and Foxit PDF reading software, and some aspects of these methods such as measurement time, repeata-bility, whether could be recorded and whether could be traced were compared and analyzed.Results There was no significant difference in the scar areas by the measurement methods above. However, there was statistical difference in the measurement time and repeatability by one or multi performers and only Foxit PDF reading software could be traced back.ConclusionThe methods above can be used for measuring scar area, but each one has its advantages and disadvantages. It is necessary to develop new measurement software for forensic identification.

Computer assisted endoscopic measurement for area of gastric lesions / 中华消化内镜杂志

Objective To explore an accurate,objective and simple method for barrel distortion correction and lesion area measurement by assistance of computer.Methods The software of Panaroma tool was employed to correct barrel distortion of endoscopy and Image J to measure lesion size and manage the relative measurement error.Computed measurement in vitro of lesion area was established,firstly,by identification of correction factor of Panorama tool to minimize measurement error; then by determination of influence of object distance change between the lens and the image.This measurement was used on patients with gastric ulcer for focal area.Results were compared with those of traditional method.Results Number of 0.1was determined to be the correction factor for barrel distortion of endoscopy.Prior to the correction of the barrel distortion,the relative error of measurement gradually increased with the increasing distance between endoscopy and the image.However,different object distances did not exert influence on the relative measurement error when barrel distortion was corrected by Panaroma tool ( P =0.141 ).A total of 50 foci of gastric ulcer were measured,results from combinational treatment of Panorama tool and Image J showed the areas (35.0 ± 5.0) mm2 were significantly larger than those determined by traditional method [ ( 29.1 ± 4.1 ) mm2,P =0.000 ],with a correlation coefficient of 0.988.Conclusion Computed endoscopic lesion measurement is a relatively accurate,objective and simple method to determine the area of gastric lesions.

Measure of Quadriceps Femoris with Ultrasonography: A Preliminary Study / 中国康复理论与实践

@#ObjectiveTo evaluate the usefulness of an ultrasonography-based method to examine quadriceps femoris contracting. MethodsThe thickness of bilateral rectus femoris (RF) and vastus intermedius (VI) and the cross-sectional area (CSA) of RF was measured in 10 healthy subjects （n=20） in a relaxed position and 3 isometric contraction states using ultrasonography by two examiners. The date was compared with paired t test. Half of these subjects （n=10） were also measured with MRI at rest. The date was also compared with paired t test. ResultsThere was no significant difference between MRI and static compound ultrasonography, nor between two examiners. There was a significant difference (P<0.05) in thickness of RF and VI between relaxed and isometric contraction conditions. There was no significant difference among isometric contraction conditions. There was no significant difference among measurements of RF-CSA. Conclusionultrasonography shows good validity and reliability in measuring quadriceps shape.

Measurement of Corpus Callosal Area in Juvenile Myoclonic Epilepsy Using High Resolution Magnetic Resonance Imaging / 대한간질학회지

BACKGROUND: To investigate the change of corpus callosal area in juvenile myoclonic epilepsy (JME), the mid-sagittal areas of corpus callosum and its seven sub-regions were measured in JME patients and normal subjects. METHODS: Nineteen JME patients (22.6+/-5.0 year-old, 6 males, 13 females) and 19 normal controls (22.9+/-7.3 year-old, 6 males, 13 females) underwent 1.6 mm thickness whole brain SPGR MRI. Exact mid-sagittal image was obtained with image reconstruction and geometric correction. According to Witelson's work, the area of corpus callosum was divided into 7 sub-regions (a1 to a7 from anterior to posterior) with a semi-automated method. In each sub-region, the pixel number was counted according to ROI definition. The whole cerebral volume was measured. The mid-sagittal cerebral area was measured by tracing inner surface of skull and basal cortical surface of the cerebrum except for corpus callosum and cerebellum. The difference of corpus callosum areas between JME patients and normal controls were tested by t-test and ANCOVA. RESULTS: There was no difference in sex [chi-square(1)=1.00, chi square] and age (p=0.941, Mann-Whitney U test). The areas of rostrum (p0.25, t-test). CONCLUSION: Rostrum and rostral body are significantly smaller in JME patients, which suggests frontal lobe abnormality in JME. This finding is consistent with previous studies reported structural and functional abnormalities of frontal lobe in JME.

Morphological Analysis of the Cervical Spinal Cord, Dural Tube, and Spinal Canal by Magnetic Resonance Imaging in Normal Korean Adults / 대한정형외과학회잡지

Cervical spinal stenosis can be diagnosed indirectly by measuring the anteroposterior diameter or Pavlovs ratio in simple cervical spinal radiographs. The purposes of this study were to assess the trasverse areas of the spinal canal,the dural tube and the spinal cord of the cervical spine of normal adults by magnetic resonance imaging (MRI), and to find the possible correlationship among the MRI results. T1-weighted MR images of the cervical spine of 100 normal adults were evaluated by measuring the transverse areas of the three structures in the axial plane. The maximal transverse areas of the spinal cord was 84.5mm2 at C5 and the minimal transverse areas of the dural tube and spinal canal were 153.6mm2 and 232.4mm2 at C6, respectively. The transvere areas of the spinal canal correlated better with the dural tube areas than with the spinal cord areas. The areas of the spinal canal, the dural tube and the spinal cord in MRI correlated better with the sagittal diameter than with the Pavlov's ratio in simple lateral radiographs.