dchist: 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/dchist - from package: dicom3tools

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

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