Accurate classification of blood cells is crucial for early diagnosis and monitoring of hematological disorders. However, manual microscopy is time-consuming, subjective, and prone to inter-observer variability. Deep learning has shown potential in automating this task, but its high computational demands limit its use in resource-constrained settings. This study aims to develop an efficient, hybrid quantum-classical model for blood cell classification using quantum simulation to reduce computational complexity without compromising accuracy. We propose a hybrid framework that integrates a 6-qubit variational quantum circuit (VQC) with a classical EfficientNet-B0 model. The model was trained and tested on the full BloodMNIST dataset, which includes 17,092 microscopic images across eight blood cell types. The proposed model achieved a test accuracy of 96.58% and a validation accuracy of 96.90%. F1-scores ranged from 91.97% to 99.84%, with notable results in neutrophils (98.80%) and lymphocytes (98.36%). These findings confirm the feasibility of combining quantum and classical approaches for medical image classification. The proposed hybrid model shows strong promise for practical use in diagnostic systems, especially in low-resource settings, and offers a pathway for future research in quantum-enhanced medical imaging.
Accurate classification of blood cells is crucial for early diagnosis and monitoring of hematological disorders. However, manual microscopy is time-consuming, subjective, and prone to inter-observer variability. Deep learning has shown potential in automating this task, but its high computational demands limit its use in resource-constrained settings. This study aims to develop an efficient, hybrid quantum-classical model for blood cell classification using quantum simulation to reduce computational complexity without compromising accuracy. We propose a hybrid framework that integrates a 6-qubit variational quantum circuit (VQC) with a classical EfficientNet-B0 model. The model was trained and tested on the full BloodMNIST dataset, which includes 17,092 microscopic images across eight blood cell types. The proposed model achieved a test accuracy of 96.58% and a validation accuracy of 96.90%. F1-scores ranged from 91.97% to 99.84%, with notable results in neutrophils (98.80%) and lymphocytes (98.36%). These findings confirm the feasibility of combining quantum and classical approaches for medical image classification. The proposed hybrid model shows strong promise for practical use in diagnostic systems, especially in low-resource settings, and offers a pathway for future research in quantum-enhanced medical imaging.
Accurate classification of microscopic blood cells is still a critical task in medical image analysis, where subtle variations and limited data can challenge conventional deep learning models. As such, we investigate in this work the potential of Hybrid Quantum-Classical Neural Networks (HQNNs) to enhance feature representation and improve classification performance in this domain. We propose a modular architecture combining a pre-trained ResNet-50 backbone with a low-dimensional latent bottleneck and a variational quantum circuit, enabling a direct comparison between quantum-enhanced and purely classical transformation mechanisms. To isolate the contribution of the quantum component, we evaluate three architectures: a HQNN model, a Classical Matched Model with an additional nonlinear transformation layer of comparable capacity, and a baseline model without an intermediate transformation stage. Experiments conducted on two publicly available blood cell datasets, namely the Blood Cell Images dataset and the PBC dataset, demonstrate that HQNNs consistently achieve superior or more balanced performance across evaluation metrics. In the Blood Cell Images Dataset, the proposed approach improves macro F1-score by up to 3.7% compared to classical baselines, while improving the F1-score from 98.54% to 98.69% in the more challenging 8-class scenario with near-saturated performance. Additional evaluation on IBM quantum hardware shows that the model remains robust under noise, with only a modest performance degradation relative to simulated results. These results indicate that quantum feature transformations can enhance discriminative representations, particularly in challenging classification scenarios, and highlight the practical potential of HQNN models for medical imaging tasks.
Peripheral blood cell classification is critical for computer-aided haematological diagnosis. In the present study, a hybrid classical-quantum deep learning framework for multi-class classification using the BloodMNIST dataset. Operating directly on native 28×28 images, our pipeline preserves morphological features while minimizing computational complexity. A lightweight convolutional network extracts features that are normalized, reduced via Principal Component Analysis, and encoded into an 8-qubit variational quantum circuit (HybridQNet). The proposed model achieves 96.26% validation and 95.12% test accuracy, demonstrating an efficient, scalable approach for biomedical image analysis.
Blood group classification is a critical aspect of medical diagnostics, essential for transfusion medicine, organ transplantation and prenatal care.Traditional serological methods while effective, are time-consuming, require specialized laboratory facilities and are subject to human error.This research introduces a novel quantum-enhanced approach to blood group classification that combines deep learning techniques with quantum machine learning algorithms.Our methodology leverages convolutional neural networks (CNNs) optimized through quantum computing principles to analyze blood sample images for accurate and rapid blood group determination.Using a comprehensive dataset of 10,000 blood sample images across eight blood groups (A+, A-, B+, B-, AB+, AB-, O+, O-), we developed and validated our hybrid quantum-classical model.The proposed quantum-enhanced CNN achieved 99.5% classification accuracy, outperforming traditional serological methods (95.0%) and conventional machine learning approaches such as SVM (97.5%) and Random Forest (98.0%).Processing time was significantly reduced from 300 seconds for traditional methods to just 3.5 seconds for our quantum-enhanced approach.We further evaluated various CNN architectures with ResNet50 demonstrating the highest accuracy (99.0%) among classical implementations.The quantum advantage was particularly evident with larger datasets, showing consistent performance improvements across all testing scenarios.Our approach addresses critical gaps in current blood typing methodologies by providing a non-invasive, rapid and highly accurate alternative that can be deployed in resource-limited settings and emergency situations.This research demonstrates the practical application of quantum computing principles in healthcare diagnostics and establishes a foundation for further exploration of quantum-enhanced medical image analysis [1][2][3] .
Leukemia is a critical blood-related health problem for which early diagnosis is a key aspect in the survival of the patient. Computer-assisted diagnosis using microscopic white blood cell images has received significant attention because the conventional manual approach is too time-consuming. In this paper, a hybrid Quantum Machine Learning-based approach for the classification of leukemia is presented. In the first place, the microscopic white blood cell images are preprocessed using resizing, normalization, and denoising techniques. Then, Principal Component Analysis is applied for dimensionality reduction. The reduced feature vectors are then mapped onto a quantum system using a Variational Quantum Circuit-based Quantum Neural Network.The presented method also validates the possibility of quantum-assisted learning in biomedical image diagnosis. Additionally, it offers a glimpse of how well a hybrid model would perform under Noisy Intermediate-Scale Quantum (NISQ) conditions. The experimental results are achieved using standard performance parameters such as accuracy, precision, recall, and F1-score. This method indicates how a hybrid model of QML can perform in a computationally simpler manner. This paper also indicates the potential of a quantum-classical system in future clinical applications for leukemia screening and diagnosis.
Abstract Classical deep learning models often struggle to fully capture complex visual patterns and to generalize effectively when trained on limited or imbalanced medical imaging data. To address this limitation, this paper presents a novel Hybrid Quantum Deep Learning (Hybrid QDL) framework that leverages the strengths of both deep neural networks and quantum circuits for advanced medical image interpretation. The proposed model integrates a pre-trained EfficientNet-B4 as the feature extractor and a variational quantum circuit as the classification head, enabling joint learning of hierarchical and quantum-enhanced representations. The Hybrid QDL model is evaluated on three clinically relevant datasets: COVIDx (for 3-class COVID-19 diagnosis using chest X-rays), PneumoniaMNIST (for pneumonia detection), and OrganAMNIST (for multi-organ abdominal classification). The model achieves state-of-the-art results, with 98.48% accuracy and 98.33% F1-score on COVIDx, outperforming both classical and prior quantum baselines. On PneumoniaMNIST and OrganAMNIST, it reaches 98.28% and 95.27% accuracy, respectively, along with high macro F1-scores. Ablation studies confirm that increasing quantum circuit depth and entanglement enhances discriminative power, particularly in complex multi-class scenarios. These results demonstrate that the Hybrid QDL framework is a robust, scalable solution for automated medical diagnosis and holds significant promise for real-world clinical decision support and COVID-19 detection.
Accurate and computationally efficient classification of brain tumors from MRI scans is critical for deployment in resource-constrained clinical settings, where conventional deep CNN architectures-despite achieving strong accuracy-often require large parameter counts that limit scalability. This work proposes a hybrid quantum-classical deep learning framework that combines a classical convolutional feature extractor with a variational quantum circuit (VQC) for multi-class tumor classification. Spatial features extracted by the CNN backbone will be dimensionality-reduced and encoded into quantum states using angle encoding; a parameterized quantum circuit will then process these features in a higher-dimensional Hilbert space, leveraging superposition and entanglement to capture non-linear feature correlations. Measurement outputs from the quantum layer will be passed to a classical fully connected layer for classification into glioma, meningioma, pituitary tumor, and no-tumor categories. The proposed framework will be evaluated on a publicly available benchmark MRI dataset and benchmarked against state-of-the-art classical CNN architectures in terms of accuracy, precision, recall, F1-score, and parameter efficiency. This study aims to demonstrate that quantum-enhanced layers can achieve competitive classification performance while substantially reducing trainable parameters, offering a practical direction for efficient, quantum-assisted medical image analysis.