dicomdump: 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/dicomdump - from package: vtk-dicom-tools

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

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