ディレクトリを再帰的に検索して dicom 情報を得る python

import pydicom
import os

class Dicom:

    def getDicomArr( self, sd ):
        DicomArr = []
        for root, dir, files in os.walk( sd ):
            for file_ in files:
                full_path = os.path.join(root, file_)
                DicomArr.append( full_path )
        return DicomArr

    def getDicomInfo( self, dcmArr ):
        dcmInfoArr = []
        studyIDArr =[]
        for eachFile in dcmArr:
            ds = pydicom.read_file(eachFile)
            studyID = ds[0x0020, 0x0010].value
            if studyID not in studyIDArr:
                studyDate = ds[0x0008, 0x0020].value
                studyTime = ds[0x0008, 0x0030].value
                modality = ds[0x0008, 0x0060].value
                try:
                    studyDscr = ds[0x0008, 0x1030].value
                except:
                    studyDscr = ''
                ptName = str(ds[0x0010, 0x0010].value).replace('^', ' ')
                karteNo = ds[0x0010, 0x0020].value
                sex = ds[0x0010, 0x0040].value
                birthday = ds[0x0010, 0x0030].value
                age = ds[0x0010, 0x1010].value
                institution = ds[0x0008, 0x0080].value
                thisLineInfo = [ studyID, studyDate, studyTime, modality, studyDscr, ptName, karteNo, birthday, sex, age, institution ]
                dcmInfoArr.append( thisLineInfo )
                studyIDArr.append( studyID )
        return dcmInfoArr

if __name__ == "__main__":
    dcm = Dicom()
    dcmArr = dcm.getDicomArr( '/var/www/html/DICOM/2017/12/18' )
    infos = dcm.getDicomInfo( dcmArr )
    print( infos )

[
['6662', '20171218', '115226', 'CT', 'Chest', 'HOGE', '21202690', '19391224', 'M', '077Y', 'SOME HP'],
['6660', '20171218', '101714', 'CT', 'Chest', 'HENO', '4700320', '19340413', 'M', '083Y', 'SOME HP'],
['6661', '20171218', '102842', 'CT', 'Chest', 'MOHENO', '20302361', '19540118', 'F', '063Y', 'SOME HP'],
['6659', '20171218', '094415', 'CT', 'Chest', 'FOO', '21702386', '19441212', 'F', '073Y', 'SOME HP'],
['6663', '20171218', '163328', 'CT', 'Abdomen', 'BOO', '20800293', '19671016', 'M', '050Y', 'SOME HP']
]

def getDicomArr( self, sd ):
    DicomArr = []
    for root, dir, files in os.walk( sd ):
        for file_ in files:
            full_path = os.path.join(root, file_)
            DicomArr.append( full_path )
    return DicomArr