gdcmscanner: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/gdcmscanner - from package: libgdcm-tools

You may install the required package with command apt-get install {package}

Error in other languages:
gdcmscanner: bevel nie gevind nie
gdcmscanner: comandă negăsită
gdcmscanner: comando não encontrado
gdcmscanner: commande introuvable
gdcmscanner: command not found
gdcmscanner: käsku ei ole
gdcmscanner: không tìm thấy lệnh
gdcmscanner: komanda nerasta
gdcmscanner: Kommando nicht gefunden.
gdcmscanner: kommandot finns inte
gdcmscanner: komut yok
gdcmscanner: nie znaleziono polecenia
gdcmscanner: níor aimsíodh an t-ordú
gdcmscanner: no se encontró la orden
gdcmscanner: no s'ha trobat l'ordre
gdcmscanner: opdracht niet gevonden
gdcmscanner: parancs nem található
gdcmscanner: perintah tidak ditemukan
gdcmscanner: príkaz nenájdený
gdcmscanner: příkaz nenalezen
gdcmscanner: команда не найдена
gdcmscanner: командата не е открита
gdcmscanner: 命令找不到
gdcmscanner: コマンドが見つかりません