3-D CNNs在肺结节检测中的多级上下文应用

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"Multilevel Contextual 3-D CNNs在肺部结节检测中的应用,旨在减少假阳性结果,提升肺癌诊断的准确性和早期治疗的效果。" 本文的研究目标是针对自动化肺部结节检测系统中的一个重要环节——假阳性减少。在肺癌的诊断和早期治疗过程中,准确识别真正的结节至关重要。为了应对这一挑战,论文提出了一种创新方法,即利用三维(3-D)卷积神经网络(CNNs)进行自动化肺部结节检测中的假阳性筛选,该方法基于体积计算机断层扫描(CT)图像。 与传统的二维(2-D)CNN相比,3-D CNN能捕获更丰富的空间信息,并通过层次化的架构从3-D样本中提取更具代表性的特征。这种方法的关键在于,3-D CNN能够处理CT扫描的体积数据,从而更好地理解肺部结节的三维结构和上下文信息。这有助于区分真正的结节与可能的误报,进而降低假阳性率。 在方法实施中,作者构建了多级上下文3-D CNN模型,该模型可能包括多个层次的卷积层、池化层以及全连接层,以逐步提取不同尺度和深度的特征。每一层都负责学习不同级别的上下文信息,从局部细节到全局模式,以增强模型的辨别能力。 实验部分,作者可能对大量的CT扫描图像数据集进行了训练和验证,以评估模型的性能。可能采用的评价指标包括敏感性、特异性、精度和F1分数等,这些指标衡量了模型在检测肺部结节时的真阳性率、假阳性率和整体准确性。通过与其他方法的对比,3-D CNN模型的优越性将得到体现。 此外,论文可能还讨论了训练过程中的优化策略,如权重初始化、正则化、批量归一化和损失函数的选择等,这些都对模型的性能有着直接影响。最后,作者可能探讨了未来研究的方向,比如模型的可解释性、计算效率的提升以及如何进一步减少假阳性和假阴性的可能性。 "Multilevel Contextual 3-D CNNs in Pulmonary Nodule Detection"这篇论文揭示了3-D CNN在肺部结节检测中的潜力,通过多级上下文建模提高了识别准确性,对于临床肺癌诊断和早期干预具有重要意义。

KeyError Traceback (most recent call last) D:\anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 2894 try: -> 2895 return self._engine.get_loc(casted_key) 2896 except KeyError as err: pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas\_libs\hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item() pandas\_libs\hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item() KeyError: '累计参会时长' The above exception was the direct cause of the following exception: KeyError Traceback (most recent call last) <ipython-input-120-194e4b87e045> in <module> 12 13 # 将时间列中的所有时间字符串转换为分钟数 ---> 14 df3['累计参会时长'] = df3['累计参会时长'].apply(convert_to_minutes) 15 16 # 输出转换后的DataFrame D:\anaconda3\lib\site-packages\pandas\core\frame.py in __getitem__(self, key) 2900 if self.columns.nlevels > 1: 2901 return self._getitem_multilevel(key) -> 2902 indexer = self.columns.get_loc(key) 2903 if is_integer(indexer): 2904 indexer = [indexer] D:\anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 2895 return self._engine.get_loc(casted_key) 2896 except KeyError as err: -> 2897 raise KeyError(key) from err 2898 2899 if tolerance is not None: KeyError: '累计参会时长' 以上代码有此报错 应该怎么改

2023-06-05 上传

TypeError Traceback (most recent call last) D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 3628 try: -> 3629 return self._engine.get_loc(casted_key) 3630 except KeyError as err: D:\Anaconda\lib\site-packages\pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc() D:\Anaconda\lib\site-packages\pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc() TypeError: '(slice(None, None, None), 0)' is an invalid key During handling of the above exception, another exception occurred: InvalidIndexError Traceback (most recent call last) ~\AppData\Local\Temp\ipykernel_5316\790738290.py in <module> ----> 1 target=wine_data[:,0] 2 data=wine_data[:,1:] D:\Anaconda\lib\site-packages\pandas\core\frame.py in __getitem__(self, key) 3503 if self.columns.nlevels > 1: 3504 return self._getitem_multilevel(key) -> 3505 indexer = self.columns.get_loc(key) 3506 if is_integer(indexer): 3507 indexer = [indexer] D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 3634 # InvalidIndexError. Otherwise we fall through and re-raise 3635 # the TypeError. -> 3636 self._check_indexing_error(key) 3637 raise 3638 D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py in _check_indexing_error(self, key) 5649 # if key is not a scalar, directly raise an error (the code below 5650 # would convert to numpy arrays and raise later any way) - GH29926 -> 5651 raise InvalidIndexError(key) 5652 5653 @cache_readonly InvalidIndexError: (slice(None, None, None), 0)

2023-05-31 上传

帮我解释一下错误:KeyError Traceback (most recent call last) File ~\anaconda3\lib\site-packages\pandas\core\indexes\base.py:3802, in Index.get_loc(self, key, method, tolerance) 3801 try: -> 3802 return self._engine.get_loc(casted_key) 3803 except KeyError as err: File ~\anaconda3\lib\site-packages\pandas\_libs\index.pyx:138, in pandas._libs.index.IndexEngine.get_loc() File ~\anaconda3\lib\site-packages\pandas\_libs\index.pyx:165, in pandas._libs.index.IndexEngine.get_loc() File pandas\_libs\hashtable_class_helper.pxi:5745, in pandas._libs.hashtable.PyObjectHashTable.get_item() File pandas\_libs\hashtable_class_helper.pxi:5753, in pandas._libs.hashtable.PyObjectHashTable.get_item() KeyError: 'is_acc' The above exception was the direct cause of the following exception: KeyError Traceback (most recent call last) Cell In[2], line 2 1 import statsmodels.api as sm ----> 2 y = data['is_acc'] 3 X = data[['ST_MP', 'Length', 'NLane', 'LaneWidth', 'LShoulderWidth', 'RShoulderWidth', 'AADT']] 4 X = sm.add_constant(X) File ~\anaconda3\lib\site-packages\pandas\core\frame.py:3807, in DataFrame.__getitem__(self, key) 3805 if self.columns.nlevels > 1: 3806 return self._getitem_multilevel(key) -> 3807 indexer = self.columns.get_loc(key) 3808 if is_integer(indexer): 3809 indexer = [indexer] File ~\anaconda3\lib\site-packages\pandas\core\indexes\base.py:3804, in Index.get_loc(self, key, method, tolerance) 3802 return self._engine.get_loc(casted_key) 3803 except KeyError as err: -> 3804 raise KeyError(key) from err 3805 except TypeError: 3806 # If we have a listlike key, _check_indexing_error will raise 3807 # InvalidIndexError. Otherwise we fall through and re-raise 3808 # the TypeError. 3809 self._check_indexing_error(key) KeyError: 'is_acc'In [ ]: ​

2023-06-01 上传