dcdump: 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/dcdump - from package: dicom3tools

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

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