How to imwrite an image with a different name than original, in specified directory?

I want to imread a previously selected image and then imwrite the same image with a variable name (depending on input user) to a specific file directory. Is this possible while using imwrite? I can't get it to work.

Patientnumber = num2str(1234567); %Input of user
[baseName, folder] = uigetfile('*.jpg', 'Select Thermal image'); % Select thermal image for analysis
                  thermalphoto_flap = fullfile(folder, baseName);
                  thermalphoto_flapI = imread(thermalphoto_flap); % Read thermal image

                    % create file directory for saving of files
                    mkdir('C:\Users\Mathijs\Desktop\Technical Medicine\M2 Stage 2\Eigen Matlab\TestOmgeving\PatiëntenMap',Patientnumber);
                    SD1 = 'C:\Users\Mathijs\Desktop\Technical Medicine\M2 Stage 2\Eigen Matlab\TestOmgeving\PatiëntenMap';
                    SD2 = Patientnumber; % Variable name, dependent on user input
                    SaveDirectory = strcat(SD1,SD2);

                    % save thermal image to file directory
                    Therm1 = Patientnumber;
                    Therm2 = 'Thermal.JPEG';
                    ThermalPhotoName = strcat(Therm1,Therm2);
                    imwrite(thermalphoto_flapI,SaveDirectory,ThermalPhotoName); %imwrite image to specified folder with input name

Answer 1

[Stalin Samuel]

Write an image name to particular folder using imwrite

[Mathijs Dijsselhof]

Thanks!