How to put filter size for option NeighborhoodSize in adaptthresh function

Dear all, I want to use adaptthresh for volume segmentation as method, But I dont know hoe to put the size of filter for NeighborhoodSize

I have code below,

The image data as attached.

clc
clear all
close all
[spect map]=dicomread('I-1312568N1.dcm');
info = dicominfo('I-1312568N1.dcm');
%gp=info.SliceThickness;
spect=(squeeze(spect));%smooth3
aa=size(spect);aa=aa(3);
imshow3D(spect)
T = adaptthresh(spect,0.000000000000001, "NeighborhoodSize","75x75");
BW = imbinarize(spect,T);
figure, imshow3D(BW)

Error using validateThreeDFilterSize

Expected filterSize to be one of these types:

double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64

Error in images.internal.validateThreeDFilterSize (line 8)

validateattributes(filterSize_, {'numeric'},...

Error in adaptthresh>validateFilterSize (line 335)

filtSize = images.internal.validateThreeDFilterSize(filtSize);

Error in adaptthresh>parseInputs (line 302)

options.(ParamNames{idx}) = validate(Value,1);

Error in adaptthresh (line 135)

[I,options] = parseInputs(I, args{:});

Answer 1

[Image Analyst]

Help says "Size of neighborhood used to compute local statistic around each pixel, specified as a positive odd integer or a 2-element vector of positive odd integers." so you need an odd integer, OR a 2 element vector, like

% Window will be 75 x 75
T = adaptthresh(spect, 0.000000000000001, "NeighborhoodSize", 75);
% OR specify both width and height independently
T = adaptthresh(spect, 0.000000000000001, "NeighborhoodSize", [75, 75]);