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A novel technique for olfactory bulb measurements.

Akshita Joshi1, Divesh Thaploo1, Xiaoguang Yan1

  • 1Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany.

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Summary

A new box-frame method for calculating olfactory bulb (OB) volumes offers reliable and comparable results to established manual segmentation techniques. This simple approach ensures consistent measurements for OB volume assessment.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Anatomy

Background:

  • Olfactory bulb (OB) volume measurement is crucial in neuroscience research.
  • Established methods for OB volume calculation often involve complex manual segmentation.
  • There is a need for simpler, validated techniques for assessing OB volumes.

Purpose of the Study:

  • To introduce and validate a novel, simplified method for calculating olfactory bulb (OB) volumes.
  • To compare the accuracy and reliability of the new method against traditional OB volumetric techniques.
  • To assess inter-observer reliability for both manual segmentation and the new method.

Main Methods:

  • Two distinct approaches were employed for OB volume calculation: manual segmentation using planimetric contouring and a novel box-frame method.
  • The box-frame method involved defining OB parameters based on a bounding box.
  • Inter-observer reliability was assessed using Cronbach's alpha (α) for both methods.

Main Results:

  • Both the manual segmentation and box-frame methods yielded comparable OB volume measurements.
  • The box-frame method demonstrated high inter-observer reliability, with Cronbach's alpha values ranging from 0.90 to 0.94.
  • Manual segmentation also showed high reliability, with alpha values between 0.91 and 0.93.

Conclusions:

  • The box-frame method presents a reliable and straightforward approach for calculating OB volumes.
  • Results obtained using the box-frame method are comparable to those from established, more complex techniques.
  • This simplified method offers a valid alternative for consistent OB volume assessment.