UTILIZE THE LEAST SQUARE METHOD TO QUANTIFY THE PERIMETER OF GASTROINTESTINAL STROMAL TUMOUR
Keywords:
Least square method, Gauss-Jordan elimination method,, PeriSolveAbstract
This study focuses on calculating the arc length of gastrointestinal stromal tumours (GISTs) to determine the
tumour's perimeter using the least-squares method. The method involves developing a mathematical equation that
corresponds to the tumour model to calculate the perimeter even under uneven conditions. Least squares is used to
find the best-fit line or curve that minimizes the sum of squared differences between observed data points and
predicted values, commonly used in regression analysis. For tumour perimeter calculation from ultrasound data, the
study employs both the least squares method and the Gauss-Jordan elimination method. By determining that 1 mm
on the graph paper corresponds to 1.2929 mm in actual size, the total arc length is calculated to be 9.5026 mm.
Manual measurements, especially with complex shapes and small details, can be prone to errors. Therefore,
PeriSolve, a graphical user interface (GUI) and professional simulator, is designed to simplify perimeter calculations
for uneven surfaces, with a specific focus on using the least squares method.
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Copyright (c) 2024 Sidik Rathi, Nurzalina Harun, Nur Fareesha Muhammad Fazlee, Zubaidah Sadikin, Mohd Agos Salim Nasir
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