Application of Fractal Analysis Method on Panoramic Radiographs and Effect of Different X-Ray Devices on Fractal Dimension Value

Year 2019, , 492 - 498, 16.09.2019

İsmail Gümüşsoy

https://doi.org/10.31832/smj.587177

Cited By: 3

Abstract

İntroduction

The aim of this study was to investigate the
effect of  different X-ray devices and exposure
parameters on fractal analysis (FA)  of
panoramic radiographs (PR) for the same region of interest (ROI)  of the same jaw.

Material
and Methods

Fourty-five
panoramic images taken with different X-ray devices and exposure parameters of
fifteen dry sheep hemimandibles were used in this study. Fractal dimension
analysis of trabecular bone was performed on the hemimandible by using the
box-counting method. The results were statistically evaluated using the Paired
t-test.

Results

For 57
kVp, 5 mA and 63 kVp, 6 mA exposure
parameters and first X-ray device, the average FD value obtained from panoramic
images of fifteen dry sheep hemimandibles 
were 1,3551 and 1,3653. For the same exposure parameters and second
X-ray device, the average FD value obtained from panoramic images of fifteen
dry sheep hemimandibles  were 1,3632 and
1,3698. There was no statistically
significant difference between the FD values of PRs taken with two different
x-ray device (p = 0.552). There
was no statistically significant difference between the FD values ​​of 1st and
2nd scanning of first device and the FD values ​​of 1st and 2nd scanning of
second device (p = 0.164) (p = 0.587).

Conclusion

Although
the FD values obtained from the same ROI on the PRs taken with different X-ray
devices and tube voltage values of the same jaw were different, the small
changes in FD values did not make a statistically significant difference in the
results.

Keywords

fractal analysis, panoramic radiography, mandible

Panoramik Radyografilerde Fraktal Analiz Metodunun Uygulanması ve Değişik Röntgen Cihazlarının Fraktal Boyut Değerine Etkisi

Abstract

Amaç:

Bu çalışmanın amacı
aynı çenenin farklı röntgen cihazları ve çekim parametreleri ile elde edilen
panoramik radyografileri (PR) üzerinde aynı ilgi bölgesi için yapılan fraktal
analiz (FA) sonuçlarına cihazların ve teknik faktörlerin etkisini incelemektir.

Gereç ve Yöntemler:

Bu çalışmada, 15 adet
koyun hemimandibulasının iki farklı röntgen cihazı ve değişik ekspozür
parametreleri ile elde edilen 45 panoramik röntgen görüntüsü kullanıldı. ImageJ
(National Institutes of Health, Bethesda, MD) 
programı kullanılarak kutu sayma yöntemi ile panoramik görüntüler
üzerinde mandibular trabeküler kemiğin fraktal boyut analizi yapıldı. Sonuçlar
Paired t-testi kullanılarak istatistiksel olarak değerlendirildi.

Bulgular:

15 adet koyun
hemimandibulasının 1. Panoramik röntgen cihazında 57 kVp, 5 mA ve 63 kVp, 6 mA
parametreleri ile çekilen panoramik görüntülerinde elde edilen ortalama FB
değeri 1,3551 ve 1,3653 idi. Yine aynı parametreler ile 2. cihazdan elde edilen
ortalama FB ise 1,3632 ve 1,3698 idi. Her iki röntgen cihazı ile yapılan
çekimlere ait FB değerleri arasında istatiksel olarak anlamlı bir fark yoktu
(p=0,552). 1. Cihaz  ile yapılan 1. ve 2.
çekimlere ait FB değerleri arasında ve 2. cihaz ile yapılan 1. ve 2. çekimlere
ait FB değerleri arasında istatiksel olarak anlamlı bir fark yoktu (p=0,164)
(p=0,587).

Sonuç:

Aynı çenenin farklı
röntgen cihazı ve tüp voltaj değerleri ile çekilen PR’ları üzerinde aynı ilgi
bölgesinden elde edilen FB değerleri farklı olmakla beraber, FB değerlerindeki
küçük değişimler sonuçlarda 
istatistiksel olarak anlamlı bir fark oluşturmamıştır.

Keywords

fraktal analiz, panoramik radyografi, mandibula

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